General :: Android Jerky Notification Pulldown?

With every custom rom i flash on my htc one x i have this little but annoying problem: the notification dropdown animation is jerky. It doesen't happen in every situation. For example in settings screen it's very smooth, this issue is present especially on the home screen. Except for go launcer, on every other launcher the animation is very slow and laggy. I post this here because i discovered that this "bug" is present also on other phones. It's annoyng and it makes the phone look slow and old

Another little thing: is there a way to disable the dim effect during notification pulldown? I think it can slow down the animation a little