Does ics run at 60 fps on the gnexus? If it can do that at 720p then specs will be pretty useless until either mobile gaming explodes or there is another resolution bump.
I haven't seen any hard numbers, but I can give you an anecdote; it definitely feels like it 98% of the time. The other 2% being a slight hiccup when multi-tasking on 4.02--something said to be fixed in 4.04.