I think that there is a substantial difference between 55 and 80. The amount of time that one has to make a decision is much shorter.

However, there are many who are completely capable of making those decisions.

I think there should be grade levels to license plates. If you pass advanced driving courses and can prove your skills you should be able to drive at higher speeds.

To a point where you are unrestrained by speed limit if conditions are acceptable for it.

The idea that everyone is of the same skill level when driving is absolutely ridiculous.

Age has alot to do with it. Reaction time, Experience, training, and equipment. All of it can contribute to whether or not you slide out of a situation or roll the car.