Loading and pulling over the vehicle ratings is quite common. Farm and Construction folks use ratings like 1/2, 3/4 and 1 ton as merely suggestions all the time.
When your vehicle is severely over loaded you know it. When it is at or a bit above it ratings it simply increases the wear and tear and largely goes unnoticed.
Personally I never had need for a big Diesel nor do I like the smell, noise and added cost that comes with them. My neighbor on the other hand thinks they are the best idea since sliced bread.
We all have or opinions. :)