What's your experience with High High's?

I know LP and PER can see 70+ growth and that Speed and ATH are generally in the low 30's.

I've never tracked passing but my gut tells me I've seen improvements in the 40's.  Does that sound about right?  Is growth between 30-40, with a reasonably chance it's closer to 40, an achievable expectation?

I picked up a D2 PG with 25 (high-high) passing last season. He's currently just over 50 and still in the blue. I think that's the best I've seen though. 

I had a SG who started at 15 and ended up at 67...52 points of growth. I think that's the most I've seen, but I've also had several others achieve about 45 points of growth. So, 40-50 is definitely attainable...

Wow, I was thinking along these same lines. I am trying to evaluate a couple of guys now, one of who is high in SPD/ATH (but his ATH is below 20). Chances are he will hit 30-35 pts of improvement in these two, assuming it is a HH as I haven't done evals yet.

I would agree that in terms of how likely they are to be "super high", Passing probably ranks somewhere between LP/Per and Ath/Spd.