Are the critics right then? Has Linux so fragmented (like Unix did) that "Linux" users must have these arguments over which distros should be supported? Or is this just another excuse to attack Ubuntu. I use mostly CentOS on my servers, and Ubuntu on my home desktop. They are both exellent distros, but they specialize in different areas. Why do critics of Ubuntu operate on such a hair trigger?
BTW, is your lab, and a significant portion of the HPC community planning on building mobile phone OSes? On existing equipment? If you, and they were going to, would you, and they be capable of installing Ubuntu?
Or are Linux installation procedures so fragmented, as well, that expertise in installing CentOS does not transfer to installing other Linux distros?