I for one really like the article. Yes it's true engineering projects aren't anywhere near as perfect or on-time as people often given them credit for, but that's exactly the point. People often expect engineering project to fit a agh exile exactly. The article is about changing that perception and dealing with the reality that as an industry we don't estimate very well at all. So we need to change the metaphors to get people to understand more clearly what is I we are doing. And the Gardner metaphors is apt. Great Article!