Average? Probably slightly less than one.
Like others I've seen my PR drop lately. Best I ever saw was 5 on main pages, the occasional 4 on some category pages. Now it's 4 on main pages and I'm happy to see 3 on category pages.
But, fortunately, PR doesn't seem to weigh that heavily on rankings...I have some top positions that I'm rather pleased with. For instance, who wouldn't be proud to have the #3 Google listing for "tranny OR shemale 'seen on jerry springer'"? Yeah, I thought so. Eat your hearts out, suckers.