
I don't know, checking the 7D prices from the same supplier it has dropped 25% on the release price accounting for the package values. Considering that bodies marketability "ages" faster than lenses....
However, I have to say Warehouse Express is not the cheapest supplier.
Looking at Park Cameras (whose prices tend to be similar to WEx and other big internet retailers) the 70-200 2.8 MkII has an RRP of £2800 and they're selling it for £1900 - 68% of the RRP. Not sure when that lens was released, but it's only a few months and the price has already dropped to near the standard 'discount'.