That's a LOT of ground. 2.5 hours for a flight that lasts 90 minutes on average?
Oh yeah, everything was done once. Took more of a military approach later on when we got reduced to less lessons but slightly more time. Steep turns were done on 2 lessons then tested to standards, stalls on 3 lessons, so on and so forth. By the end of the course they were quicker, but I know of a lot of prebriefs being 2 hours going through every minute of flight beforehand and the knowledge with it. CFI/CFII we had 2 ground briefings for every 1 flight, at least. Some students ended up taking way way WAY more. The actual flight briefings were short, but the ground briefs with lesson plans took way longer.
Why is everyone so surprised? Ground briefings are way cheaper than flying and it means the student spends less time in the air. While practical knowledge is good, it's better when the student understands it and corrects themselves. The flipside is 2 or 3 flights before the "Oh!" moment on a maneuver. I remember a student who had done 3 flights, it was his first time doing steep turns. We went up and had worked on coordination the previous day and was finally starting to use the right foot. So we started the maneuver, got low and he instantly increased power, picked up the nose a little and a bit of rudder it was all good. He said it made sense, just like a bike going uphill. We're just going up a hill in a turn. The briefing worked for him, and many more.
If you're not doing at least an hr of briefing for an hr of flight for private pilot students, you're doing it wrong. You get the hours and your students get the bill.
A LOT more babysitting than part 61. Flying everyday and the students usually only studied for the flight for maybe an hr. The rest was for classroom stuff, regs, advanced systems etc. So AFH was basically prebrief and then debrief stuff.
My favorite training was commerical pilots. They had all the basics, could focus on the more detailed stuff. 1 hr prebrief, more student led, for 2 hours of flight.