I kid... partly. What I can't get over is a common justification for using GWT seems to be "but you can program in java and Swing then!", which only holds for fans of Swing. It seems is most often advocated by people uncomfortable with Javascript development and little UI development experience outside of Java.
I don't think Swing is terrible but I do think it isn't particularly productive for user interfaces compared to Javascript or even Objective-C, C#, etc.
So if all you have a Java/Swing hammer then GWT is great, otherwise not so much.
In any event, I look forward to your post.