Very simple poses, sketchy outlines, with robot/charicature hybrids for a theme. I wouldn't really try categorizing it, though I could make comparisions to artists like Bill Sinkiewicz or Geral Scarfe.
(Sinkiewicz is a comicbook artist who originally started out as a Neal Adams clone for Marvel Comics, penciling titles such as Moon Knight and Fantastic Four before developing his own inking style influenced by Scarfe, whose cartooning was seen in various magazines and most notably on the cover to Pink Floyd's album, The Wall.)
Maybe you get that kind of reaction because 'robots' isn't a style, it's more of a theme. I think you won't find anyone who says they draw "dragon style". Their drawing theme is 'dragons', but from them their style could be realism, impressionism, cartoon, western comic style. etc.