Oh that's a sure thing. It's because of the well organised, coordinated, powerful marketing Ubuntu has. Only the precise and well thought-through actions of the Ubuntu Marketing Team allow the distribution to proliferate to uncounted masses of now-dedicated users, only the dead-effective techniques enforced thereby have the prowess to convince the millions of Joe Users to begin using Ubuntu... not.
But we try

And we hope to make it even better. It is called the most popular distribution, but that's not good enough.
Bug #1 is what we're after:
https://launchpad.net/distros/ubuntu/+bug/1
The truth is the Marketing Team is very young, and is struggling to get well organised and become effective. It's primary project is Spreadubuntu:
https://wiki.ubuntu.com/MarketingTeam/SpreadUbuntu , of which I am the leader. I'll be gone for a month now, so it might stall for a bit. I aim to have the site up by the end of August, and will do my best to get that accomplished.
--Jenda