Sounds like you ought to send an email suggesting that.
Why? It's DPReview. I'm sure there are 527 people who see that they're not testing the performance of lenses, but the performance of the system itself (ie: camera + lens). People there complain too much to the DPReview staff.
This is also why you shouldn't compare test results between different brands (eg: a Sigma 24-70 mm f/2.8 made for Nikon F-mount, and a Sigma 24-70 mm made for Canon's mount).
The only reason I don't care is because I figure, "Hey, if the lens is sharp on one Nikon camera, it'll be sharp on another Nikon camera." The actual sharpness values themselves will be affected, but so what? Good lenses will still be good, and bad will still be bad.
Photozone.de suffers from this same problem with regards to lens testing. Oh well. I still love their site.