It took 2 weeks to get my new one. First they sent the new passport with a congratulations card!
Exactly one week later I received my old passport back PLUS my marriage certificate with holes punched in the passport so I could keep it, but not reuse it. Thankfully I'll be able to save it with all my stamps. Too bad the new one couldn't be printed with them.
Hope this helps at all.
It's time. Adoption saving and process started in November 2012.