We just got ours in mid-February. We got them both back in 8 calendar days, which is 6 business days, and we did not use Expedited Service. Both of us were born in the U.S. and had certified copies of our birth certificates. My father was a Naturalized Citizen and all 3 of the other parents were born in the U.S. Not sure if that lengthens the time that the State Department needs or not, but I thought I'd offer it.
The fees were $15 each for the Post Office as the process agent and $45 each for the State Department.
I recommend that you download a copy of the application form and fill it out before you go to the passport office. Just remember not to sign them until you're in the office and in the presence of the clerk.