You are confused - he meant recharging the external flash unit, not the batteries themselves. My experience with these with a Canon external flash was also disappointing.
However in a AA digital camera they are great. They are also great for older electronics that require 1.5 voltage, like some portable music equiment from the 80's (ie Rockman which cannot run on 1.2v NiMh)
Actually he said "expect them to lose their capacity after 12-14 charges" which shows he is meaning they are rechargeable. Capacity = total space, not total stored energy.