SuperVisa holder can stay in Canada for more than 6 months and I assumed this guy's Mom lived for that time. IMO you should check the PGP Application guide and in my experience all international students who have studied here are going through RCMP fingerprint check for their PR. You can also refer to the link below which states that it may be required and CIC will not take any chance considering the security conditions in world right now.
http://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=857&top=4
International student stream and Parents Immigration stream are both different programs. International students stay in Canada on Study visa and after Work Permit to become eligible to apply for PR. Yes most of international students need RCMP Fingerprint check for PR. But this is not applicable for Parents Sponsorship because Super visa is just another form of visitor visa.