Now that he is nomintated, he will apply to CIC as the principal applicant and you will be his dependent... so you should be able to get you PR too... Not sure why you need to go to the border with your nomintation certificate...
Are you saying that you have not received your medical request? I requested GCMS note and it shows that Medical request is cancelled but, I already sent in my medical.
I dont think your theory will hold up. My application has been in process since July 15 and I have only lived in one province and been in Canada since 2011.
The reality is, no one knows how long it takes to get DM... It can range from couple weeks to 2+ months.. There is not standard wait time... I have been waiting for almost 3 months....