hmm, I've become fragmented
I am using IE9 in certain contexts and am now split between Chrome and Fx4 for everything else.
Ghostery has made it to Chrome which is awesome. NoScripts on Chrome is perhaps stopping me jumping completely from Fx as I feel Fx has become bloated. Fx4 is of course interesting so I am sticking around for a while....
What I like about Chrome is that I don't have to install Flash to occasionally view a video and that the darn thing updates pretty well without my brain being involved. This is fabulous and definitely the way to go.
Frankly, speed is not really something I see differing greatly in my experience. Certainly not for what I surf. I rarely reboot and don't tend to often close browsers.....
If I rate what I prefer to use right now.....
1. Firefox; if there was one thing to change for them, it would be to stack the plugin icons into a single button somewhere rather than on the nav and status bar. My main PC has only 1024x768 as it's a ThinkPad x61.....more is definitely more for my screen!
2. Chrome (only just)
3. IE9 (not far behind but missing things to nuke cookies after session and other plugins)
4. Safari and Opera I would not bother with. I saw them on the browser ballot thing that Opera kicked and screamed about until MS delivered it....
btw I have Linux Mint and OSX running at home, they'll get the Fx4 treatment shortly.
I think I was more excited about IE9.