The domestic 767s were ordered with the small engines because they didn't need big engines to lift a light airplane with half the gas of an ER. That said, the GEs start quickly but that's it for me. The GEs are temp sensitive so you are always taking off unpressurized vs. the Pratts. I like our big Pratt domestic 767s. The domestic GEs are dogs for climb out. Now, get a ER on a domestic flight and the big engines really shine. One of my best time to climb was in an ER from JFK to ATL. We climbed to FL360 in 9 minutes at .80 in the climb. Still doing 4000 FPM at level off. Of course, it was winter time so were minus ISA which helped.