I don't see anything on https://developer.apple.com/system-status/, but I haven't been able to install apps for development on my own devices starting at 11AM PDT.
Other people on Reddit seem to be hitting this too [0]. Anyone knows anything about it?
[0]: https://www.reddit.com/r/iOSProgramming/comments/1rq4uxl
Edit: Now getting intermittent 502s from https://ppq.apple.com/. Something is definitely going on.