Tom E, that's an interesting test. If you feel up to it, I would be interested in knowing the results of pacing at 1 round every 50 seconds (24 round pace).
Is there ever a reason to go hard from the start in training? Like Tom F said, it will help train your body to deal with lactic acid and waste metabolites. But, in training "fly-recover-fly" works better than "fly and die". There's not much to be gained in training from the die portion. There's no need to approach every workout this way. You can save this type of training for a workout like Fran.