B1 visa passport delivery lead time

[Ramgv]

I have attended the B1 visa interview on 19th Nov and did not receive any information till date. Checking the IVR and it says "still with consular post". Wanted to know if anyone of you had attended the interview on or after 19th and got your passport already.
Expecting an email for passport pickup at visa office within 2-4 days, and now wondering why is it taking longer time than that.
Can some one please brief me if it takes longer time to get B1 visa?
Thanks in advance.