https://www.youtube.com/watch?v=ZsF02hBBK_I&feature=youtube_gdata_player
Just look how fast JB will be in the SGS3. Seems even faster than the Galaxy Nexus plus having a bigger screen and better camera and all.
And... it looks a lot more faster than iOS (in the web browser, opening folders, moving through the app drawer, etc).
Who says know iOS is still faster and smoother?
I agree that Jelly Bean kicks ass. I've been playing with it for a week now and it is pretty amazing.
What sucks is the installation. It took me 10 hours to get the Galaxy Nexus bootloader to unlock. Then I had to root it. Then I had to flash the Jelly Bean ROM. In the middle of the process I semi-bricked my Galaxy Nexus too.