Seriously, ITB in with ITE and ITR?? Speed diff is pretty rough with ITR, and will be worse??

We run with ITE (C4s, C5s, and C6s) in open practice at Waterford all the time. If I'm driving my 924 at speed - it's pretty interesting. I can't see things being better in true race conditions at a fast track...

Shouldn't they be in Group 3????