I don't know where these guys get their info. Casspi was never a power forward in Europe. He's been small forward all along.
I have to say, though, the scouts weren't THAT far off the mark. Casspi was not nearly as good a shooter when he was playing for Maccabi, and there was some truth to all the faults they found with him. However, that's exactly what's so impressive about him. He is so focused in knowing exactly what he needs to work on, both to improve his weaknesses and make his strengths even stronger. And he keeps going at it in full speed. If he keeps this up, and I'm pretty sure he will because it's part of his character, he will become an allstar within a couple of years.