I didn't. That's just my personal experience with hack-job 'vert conversion Hondas.

Anyway, chop off the roof, and all those percentages you just quoted fly out the (figurative) window. A unbody coupe with no roof is lacking a critical part of the body's structure and will crumple much easier then a stock body of the exact same year and model. That's what we get for driving unibody cars.