I dunno if I really buy into the "it takes away coral food aka fish poop." They poop enough that the filter sock and the skimmer for that matter are not hurting the corals food chains. The copepod removal, I do see that one, but that's one of the reasons I sit there for 5 minutes picking them out of the sock getting my fingertips stinky and putting them back in the tank. And the nitrate factory .. well my tank went from chronic nitrates at >25ppm to 1-2ppm after I started using socks so I'm not sure that's as significant as people say. So yeah, basically it comes down to "use them" or "don't use them" as per whatever one you prefer more.
Thanks for the link though GSP, interesting reading.