I like Chrome but haven't made it my main browser because its Flash performance is poor; I can't even play a YouTube video without the video freezing up after ten seconds or so. and Chrome's Silverlight performance is absolutely atrocious.
And I do find it faster generally, particularly for Channel 9, but some pages take forever to load on Chrome while IE and FF load them quickly. Not to mention that my scroll wheel doesn't work on Chrome, nor the scroll area of my laptop's touch pad (only works in the downard direction, and too fast at that). If I close a Chrome window with multiple tabs, it doesn't even bother asking if I really want to close all the tabs; it just goes ahead and closes them all. Chrome's bookmark functionality sucks. (Photosynth plugin doesn't work either

) Yet, for all of its problems, I still enjoy using it because it feels so lightweight. But polish is severely lacking. It's performance isn't enough for the browser to stand on its own, it needs the "Google" name. If a no-name company had put out this browser, nobody would pay any attention at all.
P.S.
As for ACID3, isn't that based on "standards" that are still in development and have yet to be finalized? I recall a recent Opera beta that became the "first" browser to pass ACID3, then the next day a bug was found in the ACID3 test so it was tweaked, and suddenly that same Opera beta no longer passed. In other words, Opera's deved coded against the test rather than the standards that ACID3 was supposed to stress. Which means that Opera's ACID3 compliance proves nothing. I suspect the same for the other browsers. And Idon't put much weight on ACID3 until the things it tests against are actually finalized. Before that, what's the point?