there are more than one way of dealing with upgrades. I, myself, administer some Linux servers and I would prefer Debian, but I can understand that:
1) once a year is not too much or too often
2) 2 years of no "major" upgrades can have you deal with more problems than dealing with a cycle a little shorter.
my experience showed me that 2 years of development in FOSS can bring you more than expected changes of config formats, db on-disk formats...
it is a matter of choice, but 1 year is not that short in FOSS community.