It seems to decelerate too fast at the start and then not fast enough about halfway through, at least compared with how the native UIScrollViews "feel". Not sure how to describe that better.
Are you referring to the vertical scrolling or horizontal paged scrolling?
Vertical. One of the recent changes made it better in that the total distance you drag it is about correct, but the deceleration still doesn't feel quite right when dragging it down.
I was just coming in here to post the same issue. It seems you've implemented a deceleration curve when scrolling vertically past the boundaries, where the iOS native implementation has a hard switch to a lower velocity past the bounds. Or, at least, a more subtle curve.
I can try to make a video if need be but hopefully this'll help.