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
When engineers refuse to leave well enough alone In a column entitled "March of the Engineers," the humorist and social critic Russell Baker lamented the complexity and sophistication of his office's new telephone system...Baker closed his column by defining the new telephone system as "another bleak example of the horrors created when engineers refuse to leave well enough alone." In The Design of Everyday Things, Donald Norman wrote that "new telephone systems have proven to be another excellent example of incomprehensible design." Henry Petroski, The Evolution of Useful Things The Design of Everyday Things uxfeatures