There was an interview that J. Cole did where he said he was in constant contact with Jay-Z. Jay even told him that he talked to him more frequently than anyone else. Just because you guys don't visibly see Jay-z holding J. Cole's hand doesn't mean he doesn't get help from Jay. This is one of the problems with the internet, fans think that they should be involved in the creative process...just enjoy the music once it's released.
Also, J. Cole's buzz is actually pretty good for a new artist. You don't think it's Jay'z influence that's had him on tours and doing shows around the world with no album out? He was the opening act during the first leg of the Blueprint 3 Tour when all he had was a mixtape. New artist don't get that type of exposure.
As for the Young Money comparisons, both Drake and Nicki Minaj had buzzes before they signed their YM contracts...so you can't say that Wayne had much of an influence on them as far as introducing them to the public. It's the OTHER Young Money artists that he has to introduce us to and as of right now...who outside of Drake and Nicki is anyone checking for???