Hi Nathan,
What I understood is that IOTA is not yet decentralized on purpose, as there is load of development ongoing, and 'they' - creators of the Tangle do not want to decentralize it before is running smoothly let's say 100%, as that is how is supposed to run. I am about to go to sleep now, so I cannot look for a source, but I am sure it is on one of their sites
I think you're absolutely right I've read something like that this week. It's a smart move to do so makes it a lot safer:)