@molitar about Chainfire3D, it is different on my Sensation (don't know why, we have about the same hardware): I can keep CF3D, it doesn't change anything. But if trying to use Nvidia plugin, it's really slower with my ICS ROM, when it was not slower but exactly similar with my Gingerbread ROM
Well now with 1.7ghz, CPU1 forced online, and latest ICS build, I reach an average of 38 fps at Tekken 3 without frameskip, between 48 and 60 with frameskip, that's the very best I could do after having tried different Roms and different kernels.
Gran turismo is a pain: to slow without frameskip, to fast with frameskip...and again too slow with frameskip+frame limiter, like reported by Clouds above
Still under what Schtruck achieves with its Xperia Play (Adreno 205)