Hi!!
Application sent march 30, 2011
Letter for medical received may 13
Visa received july 15
Yay!! Congratulations!!

Good luck in Canada!
And thanks a lot for your quick answer and update-it was really importatnt for me. My application was delivered on July 5th. I didn't realize it takes them such a long time to proceed the case..
One more question: did they call to interview you? Oh and did you get any letter of acknowledgment from visa office just after submission? Or the first time you heard from them was invitation for medical exam? Thanks again:)