I think JayZ also signed Neyo to def Jam.. His signings are the ones that have brought the most money to def jam in the last 5 years.. As a Rapper I think the guy is superb and as he says, he aint rappin about things a 15 year old would while he is 40, but 15 year olds are buying his cds to get a taste of some quality music..
People can say whatever they want about his voice, his beat selections, and even some of the topics he discusses, but nobody can say he doesnt work hard on delivering quality everytime he drops something..