I agree with everyone here that it feels faster, especially in using hotmail, and I didn't get any beach balls either, which is a first for me on hotmail. The part I don't get is, there's nothing in Apple's notes about speed improvements, so how is this possible?
I also clear the cache, the browsing history and empty the cookies quite often, and re-start every time the beach balls get to me on hotmail, which gives me a good feeling for how long that lasts until it starts up again. Should've started by now and it hasn't - still quick and still no beach balls.