So what will the FE be when driving across Nebraska at 80 mph?
What will be the FE when driving along favorite FS roads in the Rockies?
The article says highway mileage will improve but the primary advantage of a hydraulic hybrid is in stop and go driving. If the article is correct they could produce a vehicle with better fuel mileage in town than on the highway.
As to your question. If you drive your pickup 80 mph fuel economy isn’t something you need concern yourself with. ;^)