That's like saying loads of people got bitten by spiders, but only Spidey gets the full complement of powers...
Well, Ok, maybe I took that to extremes. But I thought all their powers and any benefits were swapped?
Incidentally, a bit off topic Stilt, but I was thinking the other day about that aquarium thing Wolvie was trapped in.
Easily explainable by the fact he's floating in water, with no leverage to push off of, so he won't be able to generate enough force to cut the aquarium. All you need is something reasonably thick and tough.