The press release said it now has a progressive cam on the throttle bodies so that small throttle openings in the lower range of movement are now even smaller. Kinda like a throttle tamer but on the engine side of the cables. Plus changes in the lower RPM timing to work with the new throttle throw.
Personally I prefer a straight rate, short throw throttle on a sporting bike and couldn't care less about MPG.
The issue is gearing and aerodynamics. They said they improved fuel economy in town. This is because of the methods mentioned. No improvement will be seen on the highway so overall your tank range will likely be unaffected unless you are complaining about finding a gas station in town.