I thought this was a refreshingly sane and interesting look at a subject I was tired of hearing about. Additionally the comments made by jonas seem right on.
Too often Open Source is judged successful if it produces a copy of a proprietary application. I am glad to see Open Source innovating. It makes sense to put the window controls on the left, IMHO. This is the location of a lot of programs menus as well as the aplication, places, and system menu. The forward and back buttons in Firefox and many comparable controls in other apps are also on the left. I have yet to accidentally close a window. I do not suffer from uncontrollable muscle memory. After using this set up for a week I have grown completely accustom to the change and do not miss the old location at all.
If they do move the controls back to the right I will likely run the command to move them to the left. I will also likely spend no time blogging and raising hell about how things are not exactly as I would want. I have found if your happiness is always based on only one particular outcome of a situation you will spend way too much time in life unhappy.