One does not have to look further than this forum where, after the BMax release it was still pretty quiet until the beta for Windows platform was released.
Barney, you have to be fair. There were 99% Windows guys here before. The word about a new development tool on the MAC has to spread around first. I'm sure they will come. Same goes for LINUX. The news on WWW.OPENGL.ORG was a great idea they had.