I don't get what it is that people are talking about wrt speed.  I've done side by side visual tests loading JS heavy sites like gmail and google docs and I can barely tell the difference, sometimes firefox wins sometimes chrome, the main thing I'll notice is that the initial page layout flow are different, but they're basically both fast.  The network is going to make the biggest impact on your browsing speed, not the browser.  The only thing chrome buys me is having to learn some weird-to-me UI, and adding one more thing that I have to rely on Google for, no thanks.