I asked this question nearly two years ago, and got some good answers:

http://www.flyertalk.com/forum/check...o-compare.html

I suppose the TSA has improved a bit since then (exceptions for seniors, pre-check), with instances of worsening as well (threats of arrest for inappropriate comments, less use of WTMDs). Have things changed in Canada since then?

My conclusion in November 2011 was that the security experience when entering airside is materially "better" in Canada, than in the USA. Now that I'm planning a new trip to Montreal, I'm wondering, is that still the case?