Mike may be onto something. I have three DiTRs, all of them continued to grow in the first development cycle since, and yes bumps of 2 - 3 points.
I also realized one of my pitchers, in the DiTR bump, gained 9 points on his VsR and 17 VsL. And those have increased since. Certainly not insignificant.
All three of my players were low minors roster fillers. Next season they'll be starters in AA, and they're still 22 and younger.
IF these DiTR values were applied to players a little more advanced already, or IF they continue to grow at an unexpected rate, this could be something decent.