It really depends on your definition of speed. Chrome still has problems with scrolling and is very choppy on websites. (see for example desktop threads with large images). Firefox handles these perfectly, where Chrome is still choppy / lagging behind.
Chrome also cannot handle lots of tabs, and it's a known issue. I am very up to date on browsers and Firefox is quickly catching right back up to Chrome in their latest builds. The difference between Firefix and Chrome now is very slim, and the gap will be getting closer and closer as more updates take place. Firefox is no longer falling behind with their sped up releases.
Chrome is thankfully credited with Firefox getting on the ball again.
I'm not responding to argue or challenge your experience. But I must say it's completely contrary to mine. I find Chrome smooth, fast, and completely glitch free. I'm certainly not advocating for Google, or any company for that matter.
I use both Macs and PC's at home and work. My new BTO 15" MBP is my favorite by quite a margin over my new ThinkPad, but then again it's a matter of using PowerBooks and MBP's for years as my personal laptop of choice.
Perhaps a fresh clean install of Chrome (if you're so inclined) may provide you with the superb experience I am currently enjoying.
Firefox was my favorite for years, yet unfortunately in my experience they've simply not been able to keep up with Chrome.
It's important to note, that due to the nature of my work flow and desire to keep up with the latest developments, I use the current versions of Chrome, Firefox, Safari, Opera, and on the PC side, IE. So the only point being... I do have an ongoing, concurrent, baseline of experience with the most popular browsers.
Finally there's the personal preference factor, which in my opinion is the best benchmark of all.

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Another negative for Chrome. How much more information does it allow Google to collect about you.
Oh, that's easy to answer. Google knows absolutely everything about everyone.
In fact I was a bit surprised to learn that they know exactly how many eyelashes I have.
It must be the exemplary camera on my MBP ...
