(Editor's note: To access some of these stories, registration or a subscription may be required. Please check the individual links for the site's policy.)This sounds like a lame algebra question, but as always, The Business Press Maven hopes it will foster investor understanding of how Wall Street is covered. Did I really say that? I meant miscovered. Here goes: A press release hits the wires at 8:30 a.m. EST on Friday. It travels into the public consciousness, and within 90 minutes, four news outlets write several sentences each on it. Boys and girls, here is the question: Why in the name of insular industry practices do three even bother writing if they are just regurgitating the blessed press release? Business media, you wretched little stenographers, it has now been mathematically proven that you are going to wear me to a nub before the year is through. At 8:30 a.m. Friday, XM Satellite Radio ( XMSR), the faltering satellite radio giant, announced that it had ended 2006 with nearly 1.7 million subscribers and added 442,000 new ones in the fourth quarter. It also said it had achieved positive cash flow in the fourth quarter, which is good news -- unless subscriber growth isn't as great as the raw numbers suggest. Then, long-term, I doubt it will hold. But taking marching orders from the press release, the business media quickly swung into action. Speed is everything in news, right? Perspective? Accuracy? It's for wimps!