On the face of it, no one is surprised.
HOWEVER
- I note that the report obscures at least one layer of data analysis.
Do the crash heads have an a priori affinity for purchasing performance brands?
Does the branding or the performance affect the behaviour of the purchaser after purchase?
We do not know if the study was designed to answer this sort of question.
(This is an issue with the report not the study)
If it wasn't, it's not much use and any insurance underwriter could have had access to equivalent data.
(This would be an issue with the study).
- I note that the report is relatively driver-culture-specific. For example, if driving of underpowered cars at high speed go-kart style with minimal braking was actually prevalent in the local culture, it would be relatively hidden from being reported.
Sit in the passenger seat of one underpowered Asian econobox whizzing through mediaeval streets at 30-40mph and performance cars become...overegged.