I twisted one the most while using a 17.5 motor(boosted). The other 2 that I twisted weren't quite as bad even though I was using a 4.5. I might not have noticed the last one that did it, but I've been looking out for it closely now.
Both of my cars get a fair bit of use. Usually 2 race days each week. Including practice, they each get around 400 laps or more every week, I'd guess.