When a guy has had swing and miss concerns every step of the way in the minors and is all of a sudden seeing a 7% drop in his K rate and a 7% drop in his swinging strike rate with contact rates up all across the board, I would say that is progress. For him to be in the single digit swinging strike % after his entire minor league career leading up to this point where he has consistently been in the high teens, that is a bigger deal than a .053 difference in OPS.
What he is doing so far this year in AAA is so much more sustainable than what he was doing in AAA last year. And teams tell you how they believe in players with their actions. If we didn't believe in JRod he wouldn't be occupying a 40-man spot.