Earlier quoted context omitted.
Is it possible for there to be so many more vehicles than decades before that the number of insects hitting each car is much less?
Insects getting better at avoiding cars in a much shorter time than we'd expect would certainly be a prediction of Sheldrake's 'morphic resonance' theory.
They were saying, IIUC, that it could be that the same amount of bugs are splattered across a larger number of cars, so that if you look at any one car, then it looks like less bugs.