I don't think that's a big factor. Remember, we only have git history going back to
2.6.12-rc2, which was April 2005. Warty Warthog was released in October 2004, so Ubuntu's
existence predates the git history by over 6 months. I don't know how long Canonical existed
before they made their first release of Ubuntu, but I'm pretty sure it did not leap
fully-grown and armed from the head of Mark.