Here in CenDiv there is good participation in ITA and ITB. I don't ever see IT7 cars, unless they have an ITA on the side.

ITB has become a competitive group in the last few years, and is lots of fun. I have had nose to tail, and mirror to mirror races with 4 different guys in recent history. There is an OK mix of cars - A1, A2 and A3 VWs, BMW, Fiero, Volvo, Escort

ITA has good counts, and last year there was a bit more competition for the win than the year before. Also - SM or SSM (or SMT or whatever the other SM is) runs with us in our group. The fast ones do run with the top half of ITA. The slow ones sometimes get in the way of the ITB group at the beginning. I have not seen them cause any significant problem, and have actually watched some decent 'races' between SM and ITA cars from behind.

I do know that there are a few ITB cars in Midwest Council, but don't really know the competition level.