You really see the phone running more smoothly? In what respects? My home screen re-renders much more frequently, I've had freezes when I've never had freezes before, and my favorite third party apps don't work as well as they used to. I had zero issues with ICS other than with the stock email app pulling in emails, but that was a rare issue.
I'm happy that you're happy, but it's strange that we have such different reactions. What benefits are you seeing? What's working better now? Is nothing worse?