With the introduction of EES system (whose implementation was completed only a few months ago), the full data of non-EU citizens gets collected the first time we enter the EU and then we have to verify it every subsequent time.
Not much of a hassle at airports due to the availability of self-service kiosks, somewhat of a hassle when crossing with a car, and infuriatingly annoying when using a mass transit option like a bus or a train where everyone has to step outside and wait in line to do that, adding about 20-30 minutes to the border crossing.
We used the EES system in Italy, I think (cattle gates with passport scan and photo). The line was still pretty long and slow. Mostly because people couldn’t figure out how to get their passport scanned properly or they weren’t looking at the camera or any number of other things that there were signs explaining what to do and people just couldn’t be bothered doing it correctly
I wish it was 20-30 minutes. Try 2-3 hours.
Definitely depends on the ratio of first time visitors since the introduction of the EES system (whose data needs collecting) vs returning visitors (whose data only needs verifying). I was going by my last experience, but I waited way longer than an hour in the past.
I don't think that "collecting" vs "verifying" thing practically differs in anything (except for maybe intent that I don't really care for).
They printed four of my fingers the first time (presumably for "collecting") and the same four fingers the second time (presumably for "verifying"), so it was the same procedure, taking the same time. Taking a picture of me also took the same time in both cases (I had to position myself in the frame "just right".)
With that, it should take the same time "collecting" from X people as it would "verifying" X people, and so the ratio of "first-time" visitors is irrelevant.