I found airports with dedicated seniors and family line (children) to be much faster overall. TSA lines is like traffic lanes. If a car in front of you is slow or breaks unnecessarily, it slows down the entire process. When you place them in a single line, it speeds up the rest (although some adults are slow too, so it won't be perfect, but speed things up). But, at teh end of the day, the real problem is TSA rules. Take this off, take that off, and the agents don't help but yells, which scares people to act even slower. That's the main problem.