Does the B707 offer less "fat" because of its age (since initial type-certification) or was this (and, perhaps, is this still) a Boeing thing?
Turns with takeoff flaps selected.
Early models of the B707-300 series airplanes required V2+15 for thirty degrees of bank because they did not have full-span leading edge devices (except those aircraft which were originally delivered new to South African Airways)
However, later fan-powered varients did have full span LED's, so the minimum speed for a thirty degree bank was/is V2+10.