Pretty damned good. Consecutive six minute miles are good. I thought I was doing great getting my 220 lb. (1963) hulk around the ONE mile course in 5min 50 sec in basic with fatigue pants and combat boots.
IIRC we ran 5.5 minute miles in UWO, wearing shorts and sneakers.
Any way you look at it, it is respectable. It takes me eighteen minutes to get to my truck these days.