I'd have to agree there is more and more of these popping up half of them I dont even have scrypt farms and are more or less pyramid schemes.
Yes, it could be really true that some are fake. Anyway regarding Genesis Mining I am pretty sure they are serious.
They already posted their massive GPU farm back in march and probably have expanded this with much more asics (
https://bitcointalk.org/index.php?topic=467587.msg5627422#msg5627422)
I am really excited how this will continue!