I still believe it should be in the initial registration. Another words. Even though we are not trying to build sites similar to other Social networks, there are things that have been done that just work. There's no other way around it.

For instance... There's a reason Facebook asks you this right off the bat. Because it works... There are just ways that should be similar. Its because it works, its easy and doesn't confuse the user. Sometimes there is simply put, a certain technique that works. It has nothing to do with whether another site does it a certain way.

Whether your creating a Profile or an Organization? It should be the first thing you choose. And then it continue on to that particular registration.