I read one of the article on linkedin.
http://www.linkedin.com/groupAnswers?viewQuestionAndAnswers=&discussionID=128930356&gid=112681&commentID=-1&trk=view_disc&ut=1XqKhFauN70Bk1
Complete Federal Skilled Worker applications received by the Centralized Intake Office (CIO) on or after July 1, 2012, will be placed into processing if they meet the criteria in one of the two categories described below.
Category 1
You have an offer of arranged employment in Canada. The employment offer should:
be in writing,
be indeterminate in duration, and
meet the arranged employment described in this guide.
Category 2
You are an international student currently enrolled in a doctoral (PhD) program, delivered by a recognized post-secondary educational institution located in Canada, and:
have completed at least two years towards the completion of your PhD,
are in good academic standing, and
are not a recipient of a Government of Canada award requiring you to return to your home country to apply your knowledge and skills,
OR
you have completed a PhD program from a recognized post-secondary educational institution located in Canada no more than 12 months before your application is received by the Centralized Intake Office (CIO) and:
you have not received a Government of Canada award that requires you to return to your home country to apply your knowledge and skills; or
if you were a recipient of such an award, you have satisfied the terms/conditions of the award