28.3% of businesses with 10,000 or more employees plan to upgrade to 8? I find that very hard to believe. My wife's company employs 76,000 and just upgraded to 7 and she wasted half a day just getting the wireless configs straightened out. The rest of her team hasn't even dealt with it and may not be able to make the upgrade to 7 for various reasons that are too boring to explain.
I can't imagine working in IT with 8 deployed and the equivalent population of a small city people emailing at the same time - uh, where's the start button? Multiply the rest of the subsequent headaches by a factor of 500 bazillion.