[Geeflow]

I wouldn't be much surprised. The amount of things people do _not_ notice is staggering. When I do usability tests there's almost always something that doesn't get noticed although I thought it obvious and/or important.

Personal anecdote: I managed to buy paper for my printer and only noticed upon arrival that it was the wrong size. The product photo looked right to be. I did not bother to check the details - or even the product title. ¯\_(ツ)_/¯

Also, regarding "if the person isn't drunk": There's a great short talk called "the user is drunk" which makes one much more sympathetic to such seemingly unexplainable comprehension fails that sometimes drive product designers mad: https://www.youtube.com/watch?v=r2CbbBLVaPk&feature=emb_titl...