This is just like the illogical argument that people shouldn't wear their seatbelts because you or someone you know got in an accident and lived because they didn't have it on (yes people actually argue this). Sure there are exceptions to everything, but you need to look at the big picture to really make an informed decision.
Great, I like it too, but there is a time and place. Do it at the race track or auto cross circuit, not the open road putting other peoples life in danger. I don't care how good of a driver you think you are, your car becomes more dangerous and harder to control the faster you go, there is no arguing that, no matter what you think you can 'handle'.
Now this is just getting silly. Lets do some simple math now (because obviously you didn't). 30 mile drive on a highway, lets assume posted limit is 65 mph. If you drive the limit it will take you 27 minutes 41 seconds to get home. If you drive 10 mph over the limit, it will take you 24 minutes to get home, with a net savings of 3 minutes and 41 seconds. Where the heck do you get 20 minutes? 
Your vehicles must be different than every other vehicle on the road then, or your just making stuff up like the 20 minutes saved comment. 
Most vehicles have the highest fuel economy around 45-55 mph. Aerodynamic drag increases with the cube of speed. From a scientific study, "All cars demonstrated decreasing fuel economy beyond 65 mph (105 km/h), with wind resistance the dominant factor, and may save up to 25% by slowing from 70 mph (110 km/h) to 55 mph (89 km/h)."
http://en.wikipedia.org/wiki/Fuel_economy_in_automobiles
So yea, basically all of your things you say about going faster are false. If you want to be safer, save gas, and have a less stressful drive, just go slower (and maybe leave 5 minutes earlier, gee who ever thought of that!).
Sorry, I'm gonna bite, as one of my pet peeves is slow drivers. Keep in mind, we aren't saying what speed you ARE driving. On an open four lane road in nice conditions with no stop lights or other obstructions, is 45mph an unreasonable speed to expect to drive? After all, add one more lane and a median, and you would expect the speed limit to be in the 50s. What if you live in Hawaii where this road has a speed limit of 25mph? Are you gonna do 15 just to be sure?
Yes, a man tearing down the road at 90+ is unsafe in most conditions. However, there are many, many conditions in which our speeds can be exceeded safely. Rather than wikipedia, all I have to cite to prove my point is the Autobahn. No, not every road is like that, but it is one of many cases in which higher speeds can be safely achieved.
Another pet peeve is intentionally improper grammar/English. Some aren't perfect, that's fine, but when you go out of your way to butcher the language...
