Unfortunately, most of the wines they taste are not available to me, so who knows who's palate I follow. I will say that I've learned a great deal from Vaynerchuk as I'm relatively new to the wine world. It's interesting going through his earlier episodes and watching him build his shtick. I think most media personalities have learned to be themselves and if anything, be memorable (good or bad) - I think he's done both.
OTOH, while I appreciate him, I think perhaps his talents are misplaced. My kids (10 and 8) come over to my laptop like moths to a flame whenever I watch an episode. Maybe he should be reviewing gummy bears and relating them to a Riesling he recently tasted.