The xubuntu help and support page states
Below you’ll find a plethora of resources that will make getting help and resolving issues a snap. Getting help with Xubuntu is easy! The currently supported Xubuntu releases are:

Precise Pangolin 12.04 LTS, until April 2015
It is my understanding that starting with 12.04 the Ubuntu support duration is 5 years on both server and desktop. Is this not true of the Ubuntu variants?

I am considering Xubuntu as an alternative to Unity but I would like to have a longer support timeline. Can anyone clarify this for me?

TIA,

Ken