Not to threadjack, but we have a Thelma2, which is one of the ones that uses wheel support. We took our bikes on a couple of hour road trip and the winds got quite high (gusts may have hit 40mph and we were at Interstate speeds). I had the straps tight and the rack as tight as I could get it, but the bikes still moved quite a lot. My wife was concerned that the movement could cause damage to the fork or stays (I think she was thinking of the movement causing torque etc.)
I told her I didn't think that was an issue, but who would be right? She's really sensitive about her bike right now.