I agree completely Dan. Just pointing out that government + similar stodgy enterprise are one of the largest remaining IE6 users. Problem is there are a lot of horribly written intranet web apps that rely on IE6, so google's position on this is rather irrelevant to them.
Really it comes down to the fact that IE6 was the browser released with XP (which was a crazy 8+ years ago), but IE7 "only" came out ~3 years ago, which isn't really that long for a lot of sluggish enterprise IT people. The real transition for such will come when they migrate to Windows 7 (since they're skipping Vista).
Whole fiasco of IE really pushes me towards decoupling browsers from OS'.