A good article with data from facebook and others on the value of discovery over cleanliness:<p><a href="http:&#x2F;&#x2F;deep.design&#x2F;the-hamburger-menu&#x2F;" rel="nofollow">http:&#x2F;&#x2F;deep.design&#x2F;the-hamburger-menu&#x2F;</a><p>It contradicts current trends and the preferences of many designers.