Alright, here this is explained, hopefully a little easier.
If a battery is discharged at say 30 amps, what a matcher does is cherge the cell individually and then discharge it at 30 amps, from looking at the numbers you are posting. So, with a 30 amp load, that one cell will run for x amount of time until the voltage reaches the cutoff(usually .90 volt) and so over that entire discharge, the average voltage of that cell was 1.177 or whatever. When you see batteries advertised I know it says 400 something sec at 1. whatever volts. That is for one cell. When you add all six together you get the 7.2 needed to run an r/c car.
Easy reference: more seconds means more runtime and higher voltage is more power and lower internal resistance means more punch.