The last time I flew and security was packed so we got right in line I didn't get to empty right before...and something showed up on my back pocket (go figure!). BUT, I usually empty and get in line and have never had a problem with anything showing up...it's usually the people I travel with!!
I've flown both regional and international airports and always get the scanners. I've only gotten the metal detector in Paris and Laguardia...but then again in Paris they were pulling passengers out of line at the gate for the pat down
I'm knocking on wood now....I hope I didn't just jinx myself!!