Firefox 3_____2042 ms Safari 3.1.2__2561 ms Chrome 0.2:____540 ms
Actual product thoughts forthcoming after a few days of usage... but my "first 10 minutes" review is: nice, but nothing that would make me switch (from Firefox).
The new JavaScript VM should be interesting - I've certainly felt you could achieve 5-10X current JavaScript without resorting to a JIT for dynamic languages. Too much is made of the process isolation (IMHO) - though there is something nice in the idea that each tab is a "reboot" of your browser.
They also outline some UI design choices which I think are appropriate - we did them quite intentionally on AOL Explorer, and (forgive the sense of vindication but) two items I feel particularly that I pushed (larger back button and tabs above the address bar) look like they're mainstreaming... pity we blinked so often back then.
Hopefully there will be more in "Google Chrome" - a rethought browser is looooong over due. Definitely read Scott's comic commentary as to why.
Probably unfair to juedge without a test drive, but what I see in screenshots is still pretty incremental (as was AOL Explorer) - it would be a continued sign of corporate hubris to imagine success by tweaking a successful formula and sticking their brand on it.