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Not in my experience -- I have the same issues on my MBP, though I use it maybe 1/10th the time, so I'm less certain of that impression.

Yeah, that's suspicious. On my Macbook Air, which is noticeably weaker, I don't experience any of that with Chrome.

Should probably qualify: MBP from 3-4 years ago... But I don't expect it should suck this bad this quickly....