I am pretty sure most of the dancers that went onto to bigger and better things were doing both R.A.D and C.S.T.D. Ballet at the same time while attending C.S.T.D. Schools. Seemed to me when I was growing up that it was a good way to prepare for Pre-Professional Programs. I think it would be very rare to find just a pure C.S.T.D. Ballet Dancer to make it into a company. Not saying it has never happened, just saying it is not as likely.