Agreed that it won't be as effcient a someone useing a mtx to do high load low rpm shifting. It's a great step forward for the masses though, and exciting to me as an ATX driver suffering from torque converter slip, delayed shifts, etc...
I beleive the 9% figure is comparing it to a regular automatic transmission. Which makes this new ATX equal to the MTX in mpg ratings. Which helps raise Fords corprate average because most folks buy the ATX and they plan on putting this trans in pretty much all their cars by 2013. Stategery, to quote a fine sourthern gentalman