The question is why. There is a stereotype that beautiful people are more intelligent. I think that applies for software as well. Ubuntu from its very first day (20 October 2004), was the most beautiful distro, starting from installation screen. Yes the installation process that many people think it exists just to get the job done. Wrong, installation is the first impression.
Apart from the fancy installation screens, Ubuntu was also the most solid, stable, user friendly and cool distribution. Today it is still solid, stable, user friendly and has a huge user base, but is it still cool?