On a recent departure from ATH there was, in fact, passport control fast track. They let fast track bp holders use the leftmost passport control booth which then opened towards fast track security. Was not very well signposted, so I wasted 30+ min in a regular lane before asking someone and then being told I can go there. There was a kind of a sign, as it turns out, but it was not exactly where the entrance is and facing the wrong way.

Wonder if they'll have something for the incoming/transfer passengers (but probably not - I believe transfer from A to B is through the public area?)