Ah, okay gotcha... he is right as well, you need less "total" energy when you increase pack voltage. Higher C batteries will also give more energy than a lower C batt, simply because the voltage is higher under load, less throttle pull = less mah pull from battery.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens