you get moved, but your "past cred" doesn't come with you, so you look like a newbie, i've contacted them and they said it will eventually be transferred.
i find my "past cred" helps me get better people, as they know i am "safe" as many freelances i've talked to get ripped off and not paid out.
so my 72% success rate on posting jobs, hiring and completing + my freelancers feedback is important to me gaining better skilled people, + on elance they can see my $ spent so far.
this doesn't mean i pay more for each job, it just shows i pay the invoices.
tim