On the Nippising vs. Western bit:
Canadian Undergraduate Survey Consortium does put Nippising's students as most satisfied. But while this is a survey completed by many schools, it's far from all and Western is one that didn't participate.
But then I noticed, Nippising and Trent are really tied with the number of Strongly agrees but Trent has 2% more agrees. I hope the ordering between those two is because Nippising slightly edged out Trent at the .1% type level and not because they sorted by strongly agrees then alphabetical (rather than strongly agrees then agrees). Even then, I'd say they are effectively tied..
NSSE includes more schools. Both Western and Nippising are generally above average on the question of "If you could start over would you go to the institution you are now attending". Western edges out Nippising though, although it's interesting to see the difference in opinions between first and senior year, particularly if you look at Western's colleges which do so so in first year and are tops in the senior year, while Western and Nippising are both very high in first year and more average in senior year.
I don't see results from the survey of recent graduates that Maclean's did a couple times. They must have stopped doing that after they forced the universities to make the results on these surveys public.
With regards to Queen's, it appears their first years are very satisfied but their upper years are only in the top quarter or so.
Now, after all that, don't get me started on statistical significance and it's flaws and how we really don't know if there's a real difference there (Graduate courses are fun).
Remember that it often takes just as long to do a search or two on Google to try and find the answer to your question as it takes to type it in a post here, let alone the time waiting for a reply.
If your question is "What mark does it take to get into University X", or "What are the requirements to get into University X", it's on their website and/or
electronicinfo.ca (for Ontario schools). Particularly for Ontario schools, those ranges are a pretty good picture of what kind of mark will get you into the program, and if you're more than a couple percent higher it's practically guaranteed unless it requires a supplementary form.