Re B737 aborts. One of the things that I noted in the B737 simulator was that the pilot sometimes concentrates too much on getting the throttles back through the interlocks into reverse, and imperceptibly relaxes pedal pressure on the brakes. This was on the 737-200 non-RTO. On the 737 Classics there was the temptation to instinctively over-ride the RTO function, and disconnection of RTO could also occur inadvertently if the aircraft was swinging off the centre line for whatever reason.
Unless the runway is wet, reverse thrust does not make much difference to an abort. In fact I believe it is only worth 80 feet in the 737-200. I believe that there is the danger of too much accent on selecting reverse rather than concentrating on maximum brake pedal pressure throughout the abort.