The re-aging question depends upon how many TL's (accounts of all types), open and closed, that you have on your accounts. If you have a lot of accounts reporting, and a relatively high AAoA (average age of accounts), there probably won't be much of an impact. If you have relatively few accounts, what appears to be a new account hitting is more likely to lower your AAoA by a noticeable figure.
Even then, your AAoA would have to cross one of the age tiers, for instance 5 years, to affect your scores.
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit? FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007