Yes the 757/767 does takeoff with center fuel pumps on with some exceptions. Naturally the first one is if the fuel in the tanks is less than 1000 lbs you can't run them anyway. The fuel system will scavenge out that fuel. You must have at least 5,000 lbs in the center tank to run them on takeoff. If you have less than 5,000 you'll have less than 1,000 in the tanks before reaching 10,000 which is a distractor in that portion of flight. So what we do is leave them off and once we get to a less busy time we'll turn on the center pumps and burn down to 1,000.