OK, I'll bite.
I transferred from the Reserves to the Regular Force after seven years Reserve service. I had always intended to go Regular Force, but the early and mid-nineties were odd times from a recruiting perspective.
I went from Capt to 2Lt in an instant (cool parade) and after some OJT at the Regt was off to the School to take Ph III (Leopard). I then went to the Regt as a Tp Ldr. I think that this was a good thing as it let me come in at the ground floor. Transfering in directly (bypassing all training) can be difficult for the individual and I don't think that it does them any favours. I'd have done more training if the choice had been up to me, but I think that in the end a good balance was struck.
You can bring bad habits but it is up to the individual to recognize these and correct them (perhaps with some guidance). If you are adaptable then you'll adapt. I believe that going into the training system before reaching the unit helps with this process.
My advice for a Reservist with any Reg F aspirations is to make sure that you don't burn any bridges ahead of you (as well as behind you). In addition, I figure that the earlier you do the process the better.
Cheers,
2B