Oh, I think you're way off base on that. Google is far more congruent with the startup community than MS is. Just to mention one example, look at the differences in how they relate to open source (and the web itself for that matter). No doubt much of this relates to their origins. Google is the very prototype of the hacker startup that goes all the way.

Google's large-company-ness no doubt slows it down in a zillion ways, but there are still profound differences here (just as I'm sure there are between MS and, say, Oracle).