aviatorhi,
Nup. Press AUTOFLIGHT button once satisfied engines accelerating at similar rate early in the takeoff run (generally before 30 kias). Auto throttle system sets flexed take off thrust, then at the appropriate altitude sets climb power.
No push pull at all.
If Mr Douglas/Boeing/Airbus says reduced thrust take offs save on engine life and therefore dollars, who am I to say to the Co, "stuff that, I've got to used climb power at some point so I'll use it for takeoff, and be damned that I don't have performance data to back me up"?