They do break easily, would be nice if it would just be a crack or two before it spider-webs all over. I could understand a crack, two or three, or some coming out of the corner of impact possibly slowly spreading, but they do break rather quickly - even after the game having updated the one at-least in the 88 Pessima to not break so easily.
Once I did a tiny jump in a huge-lifted-stiff suspension D-Series and instantly BOOM! I was going 5 fucking miles an hour!