It's slowing down a bit. My husband and my brother in law both just walked into an Apple store yesterday and each bought the 32 GB model, no waiting. We were told they typically have them available now. No 16 GB in stock yesterday though.
They did have plenty of iPads on hand too, first time I've seen that.
It sells out the same day it gets in stock here, at apple stores and AT&T stores. most of these places have it sell out in an hour or two.