Adding to that, regarding a comment on that thread: "It'll probably still be gotten wrong by the same people who push on 'pull' doors". Culture is very important. In my native language, 'push' actually means pull! I will always get that wrong unless the design is good, meaning there's only one handle and it's on the side you actually need to pull. If there's an handle and the word 'push' just by its side than I'm going to pull it no matter what.