Hehe, i know what he's talking about, but he indeed put it in a bit crappy english. His point is to make a player lose xp based on how much he should collect from his previous earned lvl. So instead of losing xp based on your total amount, you will lose xp based on the amount you need to reach the next lvl. Example; You just leveled and you need about 100k xp in order to level again. After a while you have gained say...75k, your total amount would be pfff lets say...750k. Now instead of losing 1/6 of 750k, you will now lose a certain % (much higher than 1/6) of 100k, the amount you need to reach the next lvl.
Hopes this make things more clear!
PS 200th post