..Embassy has been refusing applicants on the ground of course being irrelevant or same as previous studies or because similar are availiable in india. Those who are being refused were also accepted by the college on some course or another so what you say now ? would you still feel if we are given admission regardless of regular or corresponce degree by college the embassy would accept that straightway ?
When in comes to a similarity in courses. I think most courses that are available in Canadian Univs. and Colleges are also available in India. Unless they're highly specialized ones. I thought that the Canadian government was more Foreign student friendlier than that.

On your second point when you say that some students are being rejected even after being accepted by the college is just really scary

I hope that doesn't happen to anyone!
Anyways lets wait and see what happens to our Visa Applications in due time.
P.S. Have you already applied for you Student Visa yet? And also have you personally heard anyone of your friends getting Student Visa Extensions without much problems once they're in Canada.