I don't see what could be wrong. US applicant, lived in Canada since the age of 17 so didn't send any police certificate (we do have the FBI PC in case CIC asks for it later anyway, but she wasn't 18 when she moved to Canada so we should be ok). I don't know what's taking so long... the original application was sent back to us due to missing signature on intent to reside in Quebec but we sent it back and got AOR on March 3rd.... I really can't think of anything that could be going wrong :/ Hopefully it comes this week...
Do you know which Visa Office has your file? For us we never got any news beyond the fact that it was sent to Sydney.