H1b extension filed, not received the receipt number yet

Hi Friends,

I filed for my H1b extension ( premium processing ), it reached vermont center on 11/08/2012. I have not received the receiot number yet. I know there is some delay now a days but want to know if it takes so many days.

My H1b is expiring on 26th of this month. Looking forward to hear some advices.

Thanks.