I get feedback daily on people using YSlow. The emails are all positive, even the ones that report bugs. The best emails describe how YSlow helped a company make their web pages load faster. It was fun to read this article on The Register today: Virgin America tunes up with YSlow. If anyone else has YSlow experiences they wish to share, please post them on the Exceptional Performance Yahoo! group or send them to YSlow feedback.
Chief Performance Yahoo! and creator of YSlow