Awhile back, when the MR2 spyder was coming out, I read an article that talked about this. It seemed like a great piece of information when comparing the handling of two cars. They were able to say the PMI was X% better in one car vs. the other. Thus one car would be much more fun to drive because the car would be able to turn faster and handle better. Since this subject was mentioned in an article from a European car mag, and I have never seen US mags talk about this measure, I am just wondering why? and can you find this info anywhere for production cars?