Fortunately perfection is not required to get results with T-Tapp. I now know that my form was pretty rotten in the early months of T-Tapp. :-) Check me out in the audience of TWO Super Slow or Critter Crunch (halfway through my size loss, at the 2007 retreat, wearing pink). Lots of extra water breaks, only one set of Hoe Downs, collapsed core, you name it. I sat down on the steps and cried like a baby halfway through the first workout of the retreat--really--probably because nobody wrings the lymph and toxins outta ya like Teresa Tapp. I cried again at the end of the retreat when it was time for "ta-da photos" because I was so worried that my tummy would look bad in the photo. But the point is that I kept learning and getting stronger and staying consistent and learning some more. Notice that being perfect (in form or schedule) is not on that list.
Progression, yes. Perfection, no.