In the tricky waters of the current economy, Google ( GOOG) reported an excellent quarter yesterday. But let's get something straight right from the start, because the business media did not with any degree of consistency: The fire-breathing search engine benefited from a good deal from cost-cutting.Prominently mentioning its cost-cutting efforts accomplishes two separate things for you, the savvy investor. First, it cues you in on how well-managed Google is. Though some thought it incapable, it can tuck and trim with the best of them. Mentioning cost-cutting prominently also lets you know that a portion of Google's excellent performance can't be repeated forever. There are, in the end, limits as to how much one can tuck and trim.