My honest first thought: hasn't Ubuntu's share of the Linux market been dropping since their introduction of the universally-reviled, highly unintuitive Unity UI? I tried out 12.04 a couple months ago, tried to use it for a few weeks, and very enthusiastically retreated back to CentOS.
but ubuntu is still an organisation to support especially in terms of them helping produce hardware that will be 100% linux compatible no matter what distro i choose to run.