Yeah, M$ will always compare to the best software. Just give them time to rip off the idea, rewrite the code in their own language, add "big-brother-esque" spyware and overprice it.. and they'll catch up every time.
To answer your ??, I keep IE7 on another comp only so I can check out positioning and such. I've found that there aren't the alignment differences with zero positioning as compared to Mozilla anymore. So I guess that's a good thing. Here are teh stats from W#C on browsers as of last month.
2007 IE7 IE6 IE5 Fx Moz S O
February 16.4% 39.8% 2.5% 31.2% 1.4% 1.7% 1.5%
I'm anxious to see what that chart looks like in 2 or 3 more months honestly.