May I ask why?
I kept getting so much lag especially when awaking my device. I tried on the recent .62 version removing all my dock icons but the original and follow the settings you laid out on your homepage. The final issue was that whwn I would go into my app drawer all my apps would be bunched up on top of each other and I would have to wait for few seconds for the app drawer to resort my apps. At first it was rare, then it was starting to happen on a constant basis. .53 seems to handle it all smooth and fast. I have zero lag using that version.
What memory usage setting are you using?
There's something in "High" that could be causing the lag that you experience when you wake up your phone.
When the scrolling caches are empty, the High setting will create caches for all your screens on the first swipe, where the Medium setting will create the caches only for the screens that are in view.
That means that (and this is only when the caches have been deleted for some reason) Medium will have a small lag on each swipe until all the caches are built, and High will have a longer lag only on the first swipe, and then it will have no lag on subsequent swipes.
I have the exact same issue. I'm set to Medium, and am running between 500 and 700 MHz. I use 3 screens. It's weird in that it happens only after using certain programs, but not every time. For example, if I use the web browser, this occasionally happens, but if I use something that takes forever to load like Adobe Reader, I have no issue.
Also, sometimes when I hit the home button, it just sits like it's thinking for 10 seconds and then takes me home.