Why is everyone on there [DT]?
A lot of very good players who had been playing for a while formed the clan. A few of us have been playing competively since the game came out. I wouldn't read too much into it, because the list does not reflect everone's opinion. Needless to say, everyone in all the above lists are very solid players. Some are just really good at playing a specific race and following a specific strategy, while others are really exceptional in most situations using many different strategies.
Since Howdidudothat made the list, kick his butt sometime if you see him online, and your name will probably automagically appear with a ranking.