not really, lets say cod4 on veteran for example is still harder than fallout 3 on very hard any day, any time. the only reason people say rpgs are harder is because they take more time, even if you play on very easy... mile high club is the hardest achievement out there, hands down. would be tougher than any RPG so stop picking MHC and throwing it ou there.
but if some one were to look up the numbers out there MHC would pale in comparison to a lot of other achievements (percentage wise to being acheived)
MHC 8842 out of 34089 a whoping 25.9% for the hardest achievement out wow? TrueAchiements.com
about 1 out of 4 players?
Unless I found the only site were people that have completed the MHC I'd say that is a pretty good statistical population.
Don't forget about untrackable things like I stated before like Donkey Kong whose to say thats any easier? Remember this entails all video games. Basicly I'm tired of hearing how hard the MHC is so please stop talking about it.