NEW YORK (

TheStreet

) -- This just in: The year so far has brought with it the return of the mega deal, with $10 billion-plus transactions for the likes of

Heinz

(HNZ)

,

Dell

(DELL) - Get Report

,

American Airlines

( AMRPQ),

General Electric's

(GE) - Get Report

stake in

NBCUniversal

and

Virgin Media

(VMED)

.

While the mergers, acquisitions and leveraged buyouts are of a size rarely seen since the credit bubble burst in 2007, it might be wise for investors to consider calls for a mega-merger frenzy as premature.

In fact, that's exactly what some top insiders in the M&A and private equity world are saying.

Mark Gallogly, head of private equity firm

Centerbridge Partners

, noted on Friday that such large acquisitions may be the exception rather than the rule, even if he expects that Wall Street is in the early stage of a post-crisis deal-making renaissance.

"These are really unusual transactions," Gallogly said of

Dell's proposed $24.4 billion buyout

and a

$28 billion acquisition of Heinz

by Warren Buffett and private equity firm

3G Capital

at

Columbia Business School's

Private Equity and Venture Capital Conference in Manhattan on Friday.

Gallogly notes that in Dell's case, the more than $5 billion in equity that company founder Michael Dell is contributing to the buyout certainly isn't the norm. Buffett's Heinz ketchup acquisition and a proposed blockbuster merger to pull American Airlines from bankruptcy also might not be symbolic of wider trends.

Still, the Centerbridge head and former senior managing director at the

Blackstone Group

said firms like his can expect an improving deals market ahead.

Even as some traders and analysts scour Wall Street for the next mega deal, investors ought to consider what Gallogly's comments might imply.

Notably, it could indicate further evidence of a consistent rise in valuations, improving executive and investor confidence, and a slow psychological turn to animal spirits from the crippling fear brought by the financial crisis.

In other words, status quo.

Consider that in the absence of frenzied periods of mega deals in 2012, overall M&A activity around the world ended the year roughly flat from 2011 levels, according to data provider

Dealogic

.

While M&A globally came in at about $2.7 trillion -- below 2008 levels in excess of $3 trillion -- the number of deals done exceeded levels from four years ago.

Even in the absence of blockbuster mergers like Heinz or Dell, private equity firms such as

Carlyle Group

(CG) - Get Report

and banks including

Goldman Sachs

(GS) - Get Report

have been hard at work in recent months.

Meanwhile, a surge in 2013 deal making may not be such an aberration from the previous year. Dealogic data show that nearly $1 trillion in transactions in the fourth quarter of 2012 was the highest quarterly total since the same period five years earlier.

Given the uncertainties in the past 12 months -- for instance, a partisan presidential election in the U.S., the so-called fiscal cliff, rising tax rates and economic woes in Europe -- the fact that the likes of

Comcast

(CMCSA) - Get Report

and

Liberty Media

(LBTYA) - Get Report

are putting money to work could signal the prospect of a post-crisis economic calamity is growing remote.

"There is a psychological effect that, in the very least, will create more deals," Brian Richards, a partner in the merger and acquisition practice at

Paul Hastings

, says of recent transactions. As a result of access to cheap financing and corporate balance sheets flush with cash, "there is an appetite in the marketplace for big deals."

Given Warren Buffett's commentary in the wake of Berkshire's $12 billion equity investment in the buyout of Heinz, the point is well taken.

On Thursday, the Oracle of Omaha said on

CNBC

he's still ready to use Berkshire's cash to bag an elephant of a deal.

Those trying to

guess Buffett's next move

might do well to consider food giants such as

Hershey

(HSY) - Get Report

or

Campbell Soup

(CPB) - Get Report

according to

Brian Sozzi, chief equities analyst at NBG Productions.

Morningstar recently highlighted energy companies

BG Group

(BRGYY)

and

Chesapeake Energy

(CHK) - Get Report

, in addition to retail giant

Kohl's

(KSS) - Get Report

, medical-products manufacturer

Abiomed

(ABMD) - Get Report

and Los Angeles-based lender

City National

(CYN)

as some

large takeout targets in 2013

.

As

TheStreet

noted

earlier in February,

Morgan Stanley's

(MS) - Get Report

proposed acquisition of a brokerage venture with

Citigroup

(C) - Get Report

could mirror the

size and strategy

of Comcast's deal for NBCUniversal and be yet another large 2013 merger.

For all the excitement over a flurry of February deals and the speculation of where the likes of Berkshire Hathaway will spend its money next, it might simply be wise for the ordinary investor to see a busy Wall Street as added confirmation of rising stock valuations, strengthening corporate earnings and a pickup in the economy.

-- Written by Antoine Gara in New York

For more on M&A speculation, see Morningstar's

11 M&A stock picks for 2013

.

Follow @AntoineGara