The quote is from the article Q&A with Colin Johanson, Part IV
Lame excuse, they should fix the game. I can only presume it involves sending ticks of condition damage to the client every second for every stack they applied to provide the waterfall of numbers on the screen. I would rather the stacks were combined to produce a single number per second or single number per condition type per second anyway. The idea of just throwing away client damage because it is too much work to tell the client about it is farcical.