Yes, the whole minority question was kind of offensive, if you make it to RMC you'll see there's a lot of diversity here, which reflects the CF overall. And back on topic, here's a link for anyone wanting to know the base grades, etc that RMC will look at.
http://bctf.ca/bcsca/psi_update_09/CMCS_Handout.pdf
Although the deductions are a little higher now (about $600 for your rations and quarters), the information is pretty relevant - your grades must be as good as they can be to be competitive amongst the other people applying for that year. Also, your grades will almost guaranteed drop by at least 10-15% when you first come to RMC, as you will have less time to study than you may be used to in high school. This is because of all the other demands on your time (squadron duties, military training, sports and athletic training, and second language training). It all takes a toll on your grades until you learn how to juggle your time effectively. Do the best you can at school, be well rounded, and apply. That's all you can do. Good luck!