About time. How else was he going to avoid a life sentence?
The Khmer Rouge Tribunal has not been exactly efficient. One sentence in six years is rather pitiful, considering the scale of crimes against humanity that were committed.
And now they have only two ongoing trials left. They're probably hoping for Samphan and Chea to follow Sary's lead.
(Nerdesque Note: Yes, this follows naming convention for Cambodian. As everywhere in Eastern Asia the second name is the personal name - but when using only one name, in Cambodia you use the personal name not the family name. Hah.)