Is Chromium noticeably smoother than Chrome on your laptop, and if so, do you credit that to GPU acceleration?
I never use Chrome. Indeed I only use Chromium because my preferred browser still has problems with retina. I'm still trying to find a mouse gesture extension for Chrome, but none work on OS X, and I find the history navigation glacially slow on Chromium (as is Safari), and the memory use of all those running processes is amazing.
Why not install Chromium, it runs alongside Chrome as I understand so you have nothing to lose... I also prefer Chromium in that it doesn't install all the Google update crap Chrome come with.
For as much as I love my laptop, it pains me to see my browser of choice behave like such a hog. Every time I think there *must* be something wrong with the computer, I switch to Safari and it just flies in comparison. I really want Chrome to catch up.
Google are pretty good at pushing Chrome(ium) forwards tech wise, and they clearly have a goal to be retina friendly, as they updated very quickly compared to Firefox and Opera (thanks to mucho dinero on their side no doubt and the ongoing battle for "the platform" of power that Google's future depends on).