For Lipon I counted the 2 years before he was drafted as D and D+1 just as though he had been drafted when first eligible. Lemieux - 167 gms, 175 pts. Lipon - 195 gms, 175 pts. Kosmachuk - 203 gms, 225 pts. In their last years of junior their ppg were; Lemieux 1.378, Lipon 1.459, Kosmachuk 1.485. So Lipon was a bit of a late bloomer, 1 year behind but by D+2 had cleanly passed Lemieux and almost caught up to Kosmachuk. Lipon's AHL scoring dropped off in his 2nd year in the AHL but that was the last year in St. John's and nobody scored. He rebounded last year to a better ppg than in his rookie year even though it was still a terrible team. So still progressing. He was not out of place in his NHL time.
Lipon was passed over in the draft, twice then taken 91 OA. Just for fun I went and looked at the players taken 90, 91, & 92 in the '11 draft when he would normally have gone. None of them has done as well so far as Lipon has. His production in the A last year was better and he is the only 1 to have scored a pt. in the NHL. He has 9 NHL games. The other 3 have 9, 6, and 0 respectively.
All the data we have on Lemieux is up to D+2. Looking at Lipon and Kosmachuk to D+2 they have both outperformed Lemieux to that point. So why does everyone want to rate Lemieux so much higher? His heritage must play a part.