Website Response Times An Article by Jakob Nielsen www.nngroup.com Users really care about speed in interaction design...A snappy user experience beats a glamorous one, for the simple reason that people engage more with a site when they can move freely and focus on the content instead of on their endless wait. 0.1 seconds gives the feeling of instantaneous response. This level of responsiveness is essential to support the feeling of direct manipulation. 1 second keeps the user's flow of thought seamless. 10 seconds keeps the user's attention. A 10-second delay will often make users leave a site immediately. uxperformanceinteraction
Some emptiness in us Whenever we encounter beauty we become aware, each time with a sense of shock and pleasure, faint though it may be, that some emptiness in us, not consciously felt but continually present, has been assuaged and fulfilled. We have a sudden high sense of completeness and harmony. David Pye, The Nature and Aesthetics of Design The Timeless Way of Building beauty