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
You are the one that is changed I tilt the room just enough, the space just enough that you may not be able to use your normal mode of placing yourself in that space, forcing you for one second to make a perceptual read and become aware that you are the perceiver and that all information comes through that perceptual act and that when you walk out of there, ...if you take that with you, you will begin to see things everywhere around you and that you are the one that is changed and you are there and that is what changed things. Robert Irwin, Robert Irwin: A Conditional Art Irwin Volumes