I love the note but ill admit it lags a bit on ics stock roms, at least for me. Not horribly but its no gs3. I don't overclock though. Smoothest for me so far is a cm10 rom by quincyatt over on xda. The occasional reboot but runs great. There are also some nice snote alternatives on the play store.
Edit: wow,just realized how old this thread is lol