Are globecampus.ca rankings reliable?

College rankings can never be 100% accurate. It's simply because there is no true objective indicator of which schools are "the best," because people have different preferences. You can make generally true comparisons between schools that are entirely different by simple prestigious standards (Yale vs. Humboldt), but even with comparisons that obvious, people have different preferences. Some of the most extensive college rankings -- like USNews -- still uses methodology criticized by some, and even if they didn't -- even if they used the most perfect methodology possible -- subjectivity still comes to play.

As for the website you provided, I wouldn't go too much based on that. I'm assuming that you're looking for basic prestige rankings, and I'm sure this website can give you basic insight into these rankings. As for detailed analysis, I'd say probably not.