3 of 4 US departures (from YYZ) pat-downs have been standard TSA ones, but more polite. The 1 of 4 was brutal, which brought me to FT - much like the other stories you hear here. No predictable timing though, because 1st was fine, 2nd was brutal, 3rd and 4th were fine -it probably coincided with the TSA "test period".

Opt-out pat down on my YVR-YYZ flight was pat-down-lite, and clearly done only because I had opted out and they had to do something. A brief frisk that I don't think even covered most of my body - hands barely touched me.