Thank you everyone!
I also forgot to mention that I was one of those candidates who forgot to disclose on the background declaration that I'd been rejected for a USA visa. I wrote to CIC after receiving my AOR and provided them updated forms (via email and mail).
So for everyone who is or has been in a similar situation, please inform CIC as soon as you can and don't worry about it
P.S- Please feel free to ask me any questions that you might have with regards to PR and please post them on the forum here for the benefit of everyone. Thanks! ;D