Useful to keep in mind that
(a) the 2 second thing (FAR 25 A/L 42 as the memory prompts) doesn't necessarily apply to older aircraft.
(b) it's been standard for quite a few years (as noted in previous posts) that, in the event that you haven't started some serious stopping by V1 .. then the decision is programmed .. you keep going. This need not necessarily be the best solution in all cases but, on the balance of probabilities, is probably the best all round risk management approach to the takeoff failure problem.