Well considering that ICS implements GPU acceleration throughout the sytem now and the only other android mobile that has this officially is the GS 2 and judging on all the videos that I have seen of the GN, it should/appears to be as smooth/fast as the GS 2 as well.
And I would say that the GS 2 and iphone are pretty much exactly the same for smoothness, so it will be the same for the GN.
And I would say that the GS 2 and iphone are pretty much exactly the same for smoothness, so it will be the same for the GN.