I have to say that is pretty weird. MMikes rom has the cfc - compressed HD version, which along with maxed out buffers per the essentials thread should be faster then my version running on top of the stock rom - and mine keeps up with me just fine.
How much free mem do you have? You don't need a boatload, so adding common apps to the exclude list in HTC Task Manager will keep em in memory and really speed up switching. I have opera and email always loaded since I'm most often flipping between them, and (along with insane buffer settings) I still have 80MB+ ram free. More then enough
Or as suggested above, just disable it and run whatever you were running on your mogul. I hear that's nice too