Back to the topic. I see that different pilots apply different interpretations of a situation which ideally should be treated exactly in the same manner. The T/O config warning in my craft sounds if:
-trailing edge flaps are not in the flaps 1 through 25 T/O range, or
-leading edge devices not configured for T/O, or
-speed brake lever not in the down position, or
-spoilers not down with the speedbrake lever in the down position, or
-parking brake is set, or
-stab trim not set in the T/O range
So FLAPS, STAB TRIM, PARK BRAKE, SPEEDBRAKE not in T/O config. I would say that all warnings should be treated without any assumption that it may be a nuisance warning. And furthermore if you get THIS warning the aircraft IS unsafe to fly, hence the trigger-sources.
So, below V1: Abort. One can dispute weither an abort at V1 is safe or not, but one should not treat abort cases as if they can be independently evaluated from case to case. That is what causes trouble...when pilots have different ways of assessing a particular situation. Stick to your SOP.