via video.yahoo.com
An oldie but goodie. Joseph has some great points in his slides:
"Everyone is amazed by fast apps. It hardly matters what else they do! Everyone hates slow apps. It hardly matters what else they do..."
"All your projects start off as blank web pages [which are really fast]. So, if they're slow, it's because you let them get slow. You let too many features and UIs get in there to the point where it wasn't fast, but if you can hold the line, then you can keep your app fast and refuse to not let it be fast."
