Iverson is much better served playing in Turkey. He will play a lot more and at a much higher level of competition. As people have pointed out, its also an extremely difficult place to play and he will learn a ton. For a kid from the Midwest, he will grow up pretty [dang] fast. Don't see why him playing 3 minutes a night in Boston is better, nor is him playing 20 minutes in Maine. The D League isn't great because I don't think the players REALLY care about winning. Its more of a place to get minutes, but the intensity levels aren't that high. In Turkey, you are playing for a title that people are TRULY PASSIONATE about. I doubt anyone at Maine cared whether they won the league title or not... does it even exist?
In any case, Iverson will go into a completely foreign environment and he will have to learn fast. He'll play hard against very good competition and the intensity levels will be high. He will be banging with some big units there who care as much or more about that next rebound as he does. He's the perfect guy to go play in Turkey.