Fresno County: Superintendent Training Ground?

I saw an interesting phenomena mentioned in Friday's Fresno Bee. Apparently 5 area superintendents are leaving their positions at the end of the school year. 3 are retiring but 2 are just relocating. A couple things about it strike me as odd. I find it all that all 5 are leaving in one period. I also find the 2 that are moving on just curious. It seems around here that people who get to this level are local yocals and stick around for ever. Are we getting a new type of head honcho? I know that some former FSUD supers are/were up for bigger areas. Maybe it is just that I was raised in Clovis and people seem to be here forever;).