I think most guys that say they are leaving around 61/62 are wishful thinking. They are going to get to that point and realize that they are going to need some extra money for their retirement. College tuition has wiped them out and they are going to want to recover from that. They have decent seniority so they can build pretty easily.
I hear a lot of guys say 62. But I have my doubts. I hate to say it, but most guys probably just have nothing better to do. Of course this doesn't only apply to pilots, but that whole age group. The rare few actually will actual retire at 60 and go fishing, travel, and visit their grandchildren.