OMG, check this out (emphasis mine):
Avoid hard acceleration and braking whenever possible. In our tests, frequent bursts of acceleration and braking reduced the Camry’s mileage by 2 to 3 mpg and the Mountaineer’s by about 1 mpg. The harder you accelerate, the more fuel you use. Unnecessarily hard braking wastes the fuel you use to get up to speed. Drive smoothly and anticipate the movement of traffic. Use your brakes as little as possible, since every time you hit the brakes you are wasting fuel. Once up to speed on the highway, maintain a steady pace in top gear. Smooth acceleration, cornering, and braking not only save fuel but also extend the life of the engine, transmission, brakes, and tires.
I have said that so many times. Brooke knows!