Glueball - it is the culture which perhaps leads to departures outside Perf A limits which is being questioned, not Capt Marty per se.
Limits are limits. Whilst there may well be a margin of fat in RTOW/ATOW, you simply do NOT know how much. If I ever had a pilot examinee of mine paying lip service to RTOW, he would be grounded immediately. No quarter given! Commercial pressures notwithstanding, any compromise of mandatory safety margins is illegal and must never be permitted.