Billings discrepancy watch: WaMu

Here's my second billings discrepancy post, wherein I contrast and compare the different billings figures accorded to accounts by different publications. This time around it's WaMu, which shifted its, um, very big account out of Leo Burnett and to TBWA/Chiat/Day. Here we go:

1) Advertising Age: $173 million; no source cited.
2) Adweek: $100 million-plus, with the proviso that, according to Nielsen Monitor-Plus, WaMu spent $120 million last year and $75 million in the first two-thirds of this year.
3) Mediapost: $100 million; no source cited.