how many diesel sports cars do you find? or diesel race cars?
Guess you haven't seen the guys with Ford Superdutys that drop the Cummins 6B in there and run 11-12 second 1/4 mile times... It's quite entertaining to see an 8000lb truck go down the track that fast. Some of these guys also drive their trucks everyday.
I live in Texas , Dallas Fort Worth to be exact, and we are one of THE hot spots for truck sales in North America. Dodge sells more 3/4 ton diesels here than anywhere else. I drive 40 miles to work every day and I see Ford Powerstrokes pulling car trailers with 3 full size vans/trucks/cars whatever on them.. Now that is very dangerous (why I am looking at a skoolie and not a Ford/Dodge) but these boys have no problem keeping speed. Of course the gearing isn't there in a skoolie, but the power potential and reliablity is. Not to start an argument, just to understand where I am coming from. Now reality might come and smack me in the face when/if I get my skoolie loaded with my 5k truck on it and a 7000lb trailer behind it.
Now I agree out of the box a diesel is designed to run at 100% all day long..usually at a lower power output than a comparable gasonline motor, but what you can do with a set of tools, a good Exhaust gas temp gauge, and some injenuity to an already turbo charged diesel motor would surprise most.