Stage 1 AOR means that they already received your application package and they are ready to assess your sponsor's eligibility to sponsor you. Some people don't get the AOR (which on an average is issued at the first 2 weeks) but they receive it together with the Sponsorship approval.
You are on your 15th day since you filed your applicatioon. You should be receiving AOR soon, maybe within this week or next week.
Here's the sample AOR letter (mine) that should be emailed to your sponsor's email address:
AOR will be sent to your Sponsor's email and it goes like this:
UCI: XXXXXXXX
Application No.: XXXXXXXXXX
Quote these numbers when corresponding with our office.
This is an automated message. Please DO NOT RESPOND to this message.
Dear XXXXXXXX,
This confirms that your application to Sponsor a Member of the Family Class has been received by Citizenship and Immigration Canada (CIC) on 2013/07/03 on behalf of the following member(s):
XXXX XXXXXX