Maybe its different in the G4 world of small corporate jets. Perhaps you just stand em up and go for it on each runway. But here in Europe its balanced field all the way. Nice long runways such as in places like Madrid have high V speeds. Go into somewhere tight with a 70t jet and the numbers get smaller. Using the least amount of thrust keeps the shareholders happy and hopefully the engines going for longer. It also keeps the tree huggers happy with a lower noise footprint and climb performance is greatly improved. Now how much tarmac we chew up after V1 to get to VR I have no idea. Why don't you get your calculator out and see what you come up with. Point is V1 is stop or go time. After that your committed to getting airborne.