I don't think they set out to make the optima look bad, they set out to test it using similair parameters that CE units are tested at.. The test data Kevin released is fairly close to what I have heard in the past..

The test shows that the extendair does not do well at high flow rates with high co2 production..

If you are comparing scrubbers the worse case is a good starting point, high flow rates quickly show flaws in a scrubber.. Anyone can choose test parameters that make their units look good..

We all knew ahead of time that the sport kiss did not do well at high flow rates due to its shape but had reasonable performance when flow rates were kept in usual dive parameters.. The all out tests have their uses, since it is possible to reeach these flow rates for short periods of time.. Scrubbers with longer beds will do better at high flow rates but will usually also have a higher wob (unless the diameter is increased as well)