The only exception is when you need to drive a long distance, like 800km, have clear weather conditions, highways in good condition with little traffic (like on weekdays in July-August in France). Then driving 20km/h faster saves about 1 hour, which is not negligible. But then you spend 30€ or 40€ more on gas, risk getting a 90€ fine and risk losing 2 driver license points (out of 12), without mentioning the danger.
Personally I stopped driving long distances: last time we traveled 800km, we took the train.
I’m intrigued that there is such a majority for 90mph. That seems to assume you are reading the dial backwards to me, i.e. from 100 down one tick is 90. Whereas you would of course usually be approaching this mark from 80 (at least the first time each time!) and so 85 seems logical to me.
Having experimented a little (don’t ask too many questions…) it actually seems that the answer is …
Actually, (at least as far as my reasoning was concerned) 90 is the most obvious answer simply because it’s a tick that’s half-way between 80 and 100.
Since you’ve experimented, it would be cool to know what is the actual speed at all the nearby ticks the speed only at the tick itself doesn’t really tell us too much…
Velocity feeling is linked a lot with the car quality. I drove some hundred of thousands kms at much higher speed as what is mentioned here in good german cars (bmw and benz) and i felt like being very confortable and quiet. Slower i would feel much more dangerous, being tempted to fall asleep.
Today I drove a car (European, kilometers per hour) and now I’m wondering why nobody asked where on your picture 25 mph is. So to keep this on topic: Why did nobody ask, where 25 mph is on that picture?
Not easy for me to answer. If the situation involved some forced or obvious moves, then I would say “Great…,” but that usually isn’t the case, hence my answer.