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
Spatial expectations Loya, who served seven years in prison for multiple bank heists before becoming a writer, explained to me that it was during the getaway that he often had the best chance of thwarting people’s spatial expectations. In his case, this meant that what he did immediately after leaving the bank was often the most important decision of all. Geoff Manaugh, A Burglar's Guide to the City Bandits