Slasher, 411, and all:
My "safety check" on the 757/767 is: Spoilers, Flaps, Trim (all three axis), RTO, runway on the EHSI (to confirm proper position, runway, and alignment), and "whiskers" on the EADI (on the 757l767 the Pitch Limit Indicator for Windshear guidance only appears when the flaps are out of the up position - another confirmation flaps are down). Normally also have departure runway localiser tuned also to confirm correct runway.
In the last six years, while jumpseating, I have witnessed two aircraft go into position and hold with the flaps up (and commented accordingly). Yeah, the warnings would have probably worked, but.........