He is not as big as Delahoya or Tyson but who is? DLH is the most famous non heavyweight of all time and Tyson is the only fighter in modern times as well known as Ali.
You will have to find out when he comes off this huge momentum he has...i.e lose a fight. Oscar kept his star power after he loss, Tyson kept his star power after he loss.....right now Pac is the flavor of choice if he should lose and still remain the way he is now then i think you can gauge it a little better.