Arrived last night into T1 from LGA. After a 15 minute walk to Customs (we were at the last gate), we tried to come down the escalators into the Customs hall, we were met with (our estimate) over 500 people snaking through the lines to be intereviewed by about 8 officers! Even the AC pilot line had over 25 of them lined up; never seen that before. Once at the counter, the Customs guy moaned and complained about how all Canadians hate them, to which I agreed and told him I would be applying for Nexus to avoid all this again. Guess he didn't like that and sent to me to Secondary to penalize me for my comments....I've only ever had bad experiences flying from the US into T1...I can't imagine this place in 5 years. I'm close to switching to AA that flies into a fairly quiet T3...AC can keep T1!