No, but then again the URL bar's color rarely comes up when I do smalltalk. I've also never heard anybody in real life mention the size or color of "order" butt

No, but then again the URL bar's color rarely comes up when I do smalltalk. I've also never heard anybody in real life mention the size or color of "order" buttons, but I have pretty reliable data that even among choices that will seem to be completely reasonable, some will convert at 3x the rate of others.