My machine fits the bill: T7200, V5200 GPU, 3GB RAM, Windows 7-64, Catalyst 10.2. I averaged 19-20 FPS, occasionally getting as high as 21 or as low as 14.
Edit: I should have added that these results were obtained with the laptop docked and displaying to an external UXGA monitor. Presumably the results would be better if I displayed to the laptop's UXGA screen.
My results are identical, with the 19-20FPS average. However, my machine has a T2500 (Core Duo @ 2.0GHz,) 2GB of RAM and an SXGA+ screen, but is otherwise the same. Also, according to Process Explorer, opera's plugin wrapper IS using some GPU http://prntscr.com/e5918/direct
Perhaps those with integrated graphics could test this as well?