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
Blueprints Blueprints lead to the making of things that are abstract, not always based on reality. Once something becomes abstract, it breeds disconnectedness — separation and the inability to connect with our surroundings. People buy houses from blueprints, but then don't like the actual house: "What on earth is this? I had no idea it was going to be like this...etc." Christopher Alexander, The Battle for the Life and Beauty of the Earth Maps and observationThe preliminary sketch makingdesign