Of course the reviews are subjective. So are the comments in this thread. What I'm saying is that Tirerack has a lot of subjective reviews that say this tire is good in the rain while this thread has a small number (relative to Tirerack) of subjective reviews that say this tire is not good in the rain. I'm curious why there is such a discrepancy.
What table are you referring to? I found the table that has all the other current "On-/Off-Road All-Terrain" tires, which is the Tirerack category this tire is in, but it does not have the old KO. And where was the old KO "objectively proven to be one of the worst...?" Did someone do some do some actual quantitative testing? It would be interesting to take a look at those tests, perhaps they tested the new KO2 as well.
I posted a link to an actual test of available AT tires from expedition portal a few pages back. It's there. It appears they've dropped the KO from the table since I last looked at it, but they also had it above the AT3 which was proven to be superior in almost every category (to the KO).
Subjective data is just that. It has a lot of bias and variances from people that live in and use the tires in a variety of different conditions. In that same post a few pages back I explained a why this information was useless and why you shouldn't rely on it alone.
Edit: I get that this thread is full of subjective information, I mentioned that as well. Peoples opinions are useless without actual data to support it. When you have nothing else to go on, the sure, anecdotal evidence may be the best source if you're unable to rely on anything else. You need to consider the source though.
For an example, in Houston we get a ton of rain each year, but few actual rainy days (less than 1/3 of the year) but when it does rain, it rains for days and it tends to pool on the road. If someone from Arizona, Nevada, Utah, and Southern California swears that theirs tires are great in the rain, I'm going to discount that opinion due to the fact that their situation is nothing like mine. Even someone in Austin, because even though it's in the same state, their climate is vastly different than mine.
All that said, a customer survey is useless in this regard because you have no way of knowing where the person drives, what conditions they put it through, what their driving habits are, or how many miles they actually logged in that situation.