H1B petition filing confirmation


I received confirmation from my employer that my H1B petition got filed on 8-Jun-12. (cap reached on 11-Jun from USCIS sources). Does it mean filing the application itself will count against the cap or acceptance of application only will count against the cap? As I received the confirmation from my employer that the application is filed, can I be sure of getting the petition number from USCIS after the specified time? Or will there be any chances of rejecting the petition?

Any information on this question, would be helpful. Thanks.

If the petition reached USCIS by June 11th, then you have made through the cap.