Don't see anything wrong with this. Don't know if I'd agree, but it's not that ridiculous of a claim.
EDIT: Glad they cleared this up...
"While commercial success is important to the equation -- and the sole reason the brilliant Talib Kweli and Pharoahe Monch aren't included in the debate -- it's only one variable."
...since in rap Pharoahe Monch would probably be my pick.
yeah nas isnt a ridiculous claim at all