This is a video from David DuChemin who is becoming one of my favourite photography teachers. In this short video David talks about a few things that I guess Tony touched on in that piece he did on getting folks to stop asking about EXIF data. David is touching on some similar material. One of his points is that when we ask what camera, setting, lens or post processing technique was used, we're asking the wrong questions. Anyway I recommend taking the ten minutes and giving a listen.