PFF have done a very good job of analyzing players and their potential at both the NFL and College level. They have an army of nerds watching tape of every player in every play of every game to compile the data. They were the first "media" high on Baker last year, and have been super high on Kyler since week 1 of last year.
They aren't perfect. No scouting system is. I would argue their evals of potential college success are going to be more open to error because of how large the variables are. At least 25% of most rosters are new. The players are at an age where there are still massive opportunities for improvement physically, mentally, etc...
I wouldn't be surprised if Blake finally puts it all together, and combined with a QB friendly offense puts up the numbahs to be much higher than 44. Also wouldn't be surprised if what we saw the last 3-4 years across three different teams is what we get.