Take-off speed?

Trim is critical...per other posts. I have noticed that the VR speeds provided by the FMC seem a bit low, I would exect to rotate at 130-140 like most medium size jets...but without performance tables, I'm not sure. What were your flap settings.As far as the length of the runway used, the flight model of this airplane is so good, wouldn't be surprised that launching with a fairly heavy airplane from KPHX in the summer time would have that effect. I tried to launch from KDEN last summer on a hot day, and the FMC wouldn't let me without dumping some weight, and no derate on the engines (using 767 PIC). It's definitely smarter than me. regards,