For me, first real bull**** reaction came with Noguchi Yukio's filing system. There was time when I was heavily into photo organization and DAM/DIM systems. That was time when I learned that chronological organization only works when you remember everything in your system. Your head will be the keyword index about your archive.
After quickly reading the article it seems that there really is nothing new in it. Aside being evernote advert.
Anyway, I already know system like that would never work for me. Also, I don't think GTD is complex system, it's just two questions (what's the succesfull outcome, what's the next action), organizing your answer to those questions and regularly reviewing what have you done and what you need to do.
Total GTD newbie, better with the GTD theory than implementation.