OK, I went through. Not really a problem.
You're asked to check whatever is not a purse, laptop, etc.
US customs was typical, Canadian magnetometer station typical. However, on the way to the actual gates, there is mandatory pat-downs and bag searches (Canadian Security). Check your bag to keep these lines down, as a courtesy to your fellow travelers. Baggage wait was only slightly longer than typical, they had our bags on the carousel about 10 minutes after we all got down there.
Nothing to see here... :-)