No, they didn't start there,however they are one of their memes.
images.google.co.uk/images?hl=en&source=hp&q=4chan+motivational+posters&btnG=Search+Images&gbv=2&aq=0&oq=4chan+Moti
(images.google.co.uk/images?hl=en&source=hp&q=4chan+motivational+posters&btnG=Search+Images&gbv=2&aq=0&oq=4chan+Moti
Redsushi! Whoop! Whoop! Yes, that one!,
Thu 5 Nov 2009, 23:34,
archived)