Campesinos,
I heard the 90Moz figure from an extremely reputable source.... umm...errr....it was a HC post.
I have had a bit of a trawl back through the posts but cant find it. I'm sure I didnt dream it. Someone help us out here, where did that figure come from?
(Slinks embarrassedly of to corner muttering about vowing to verify facts before posting in future)