How often is it worked on, and how many people actually work on it? I looked at the update progress page and see some libraries of version C++98 with a "to do" status. Or... maybe the update progress page hasn't been updated?
I think most of the reference here is up to date, more then half of it is already C++11. Wont be long before all of it is. You can always Google the few bits you need more information on.