Okay, let me clarify further, then. I've seen plenty of D-League games, and I attended the D-League Showcase last year. (I've also attended and seen Ian at the Rocky Mountain Revue, which is a similar talent level at times.) The D-League is a poor league with relatively few players who will ever get even a 10-day contract in the NBA; it's probably the equivalent of a low-level European league, or mid-level European league at very best. Ian faced some good defenders in that league, but a lot of the time he did not.
The Nets have a solid core of talented young players in Lopez, Yi, Lee, and CDR, and are better than their record indicates. If you threw them in the D-League, I have no doubt they'd win 80-90% of their games (perhaps more if they executed well every night). That said, they're currently a team that is seriously underachieving. For whatever reason, they haven't been able to put things together, and it shows in every game, including games where they play a good Spurs team within 12 points.
Ian looked good last night, and it's a step in the right direction. However, I'm simply saying that after a single 15 and 9 night against the lowly Nets, I really don't think we know that much more about him than when he had 32 and 17 against the Utah Flash. If he starts contributing consistently, then it will be a different story.