It didn't look to me like JR was insulting the methods used in this test, so much as adding his own experience with the media. The sarcasm and biting wit are just part of JR's personality - get over it
I do disagree with Butterfly's "you need more plants" statement, though - with the number of koi keepers who absolutely REFUSE to allow plants in their koi ponds - there would be an awful lot of nitrate problems out there if you needed plants.
While I realize I was incorrect about the "collecting in the trays" thing - it still drives home the point. BH worshippers consistently claim the media magically removes solids from the system - the sediment coming from the midwater pickups would seem to indicate that, as any logical person would expect, the shower is simply pulverizing the crap out of the... crap.
And note I said BH worshippers - there are many who just say "hey, I use the filter and it works great". There's nothing wrong with that - if you want to pay that kind of money for a hunk of clay, and it keeps your water clean, more power to you. The worshippers are in a whole different class, though.