I was out riding I-10 in West Texas last month into a strong headwind traveling at about the posted speed limit of 80 mph. At times I was WOT and my fuel economy dropped to 26.41 mpg for the leg into Van Horn. For those conditions, the DL650A is a somewhat under-powered, but it does still get the job done and I am happy with my choice for a first bike. Almost anything smaller would not be able to perform adequately in that environment.
After I get a few years of riding experience, I will get something with a bit more go, perhaps a Super Tenere, and utilize the DL650A for my daily commute.