Why AOR not sent nowadays
AOR from visa office ISB was somewhat halted in mid 2011. (some applicants still got AOR). Mostly, applicants would receive an AOR after file transfer from their respect VO. Suddenly it stopped (reason unclear). CPP-O never sent AOR (nor did you even know your file was in Ottawa unless researched). However, there are some cases were AOR was provided and most of those cases have been or being cleared.
Cpp-O is working, many "american" fellows are landing within 3-5 months. (especially fellow Buffalo applicants). I haven't seen any progress for the pakistani community as of yet. November 2011, is the earliest applications transferred to Ottawa for processing....