So the question is, if the Islanders keep him in the NHL, what can we expect from Okposo for his next 40 games? This chart shows the ratio of NHL points-per-game to NCAA points-per-game for all players who've jumped from college to the NHL since 1979:
So 50% of players retained 29% of their scoring in the NHL; just 10% retained 48% or more. Okposo has had a pedestrian 2007 NCAA season (11 points in 18 games), and if we combine that with 2006 (40 points in 40 games), his middle 50% scoring range amounts to 7-14 points in the second half of the 2007-08 season.
That seems a little conservative, and we should take into account that Okposo isn't 20 years old yet. This chart shows the difference in PPG ratios by age:
So we were probably 25% too pessimistic with our projection. Okposo is a good bet to pick up between 10 and 18 points in his next 40 games. That's low enough that the Islanders might just assign him to their AHL affiliate, and we won't see Okposo until next year.