Hmm. Not to sure about that one. I've been taught with no flap, 2 stages and 3 stages. And whenever I'm flying dual, he'll always ask me how I'm landing. Sometimes I chose three stages, sometimes two and sometimes none at all.
Whilst I've only flown with two instructors since re-starting training, I seem to remember my initial lessons (mid 2004) were conducted in the same manner - 2 stages.
I don't know what to say really, anybody else with experience on PA28 care to comment? Like I said, I've done a lot of landings with 3 stages, but I was originally taught (and my 1st solo was completed) using 2 stages to land.