g1smd - 5:54 pm on Jan 9, 2009 (gmt 0)

I always estimate three to six months for the effects to change over, and that seems about right.

I'll chip in with another related effect, and on the same timescale as yours. For a site redirected to new internal URLs in early October, Google dropped the last of the old URLs just a few days ago. I haven't looked at PR for that site, but I expect it will follow the same pattern as yours.