Do you think the icon "☰" is enough for users to know that a menu is underneath? Medium.com doesn't even use an icon, it is linked from its logo on the top. Other websites just use the word "Menu" which I think is a little more intuitive. Is the "☰" becoming the international symbol for "menu/...

"Three horizontal lines" seems to be becoming a convention for the "main menu" button on mobile sites: Has anyone done any user testing of this convention, or got any A/B testing results? (i.e. is there an increase in bounce rate compared to using the word "Menu"?) I did some quick user testi...