Usually more of a Psycher-stuff-with-extra-faustian-bargains sort of deal, but there's always been a rather blurry line between what's sorcery and what's psychery. The usual fluff way to tell is is it's someone on your side then it's psychery, if it's an enemy (or someone on your side you don't like) then it's sorcery. If you're chaos, then it's probably sorcery anyway regardless of who's telling the story.