'Wheelie'
I think its safe to say that it's been established that the FI's technique is certainly 'interesting' at best.
I would just second what one or two others have said about the nose wheel being in the air for around 2 seconds. That would seem to indicate to me that your nose is in a high enough nose up attitude. You can't leave it up there much longer as at some point you do obviously need all 3 down and to bring the aircraft to a halt as no doubt you're not always going to be landing on a long runway.
I was always told to 'wheelie' the C172 in and then hold off, bringing the control column back and letting it settle onto the runway. I can't see that you are doing anything wrong??