No one knows, because literally no one here is employed there (in this forum). The only thing I can tell you is that it's possible to get straight out of college. I've only seen this at KPMG though. It might have just been a spur of the moment thing though.
As mentioned in another post, I believe people generally go into assurance/tax first, then transfer to TS. As far as I saw, it's pretty easy to transfer internally. Several new people in the TS division last summer were from assurance.