Opinions are like a-sholes - everyone has one. Because this man's opinion agrees with your desire for Sanchez to be average, does not make it so. By his own admission (and again opinion), Sanchez can develop into an efficient passer - game manager perhaps...and that would be a good thing. I know nothing of Sanchez, but opinions of Brady coming out of collage were not high and we all know how that worked out.
if Sanchez fails, it would not totally surprise me as I am not a fan of USC QB's, but if he pans out, well, he was taken 1st overall.... Said to your post I don't think this mans opinion validates yours, just similar - only time will tell.