Well Socket.io and Websocket have been down for a while, for all of us it seems.

Except for this guy, older API version or something? Or maybe just lots of HTTP requests?:

http://bitcointicker.co/

EDIT: curiosity got the better of me, wireshark caught this:

GET /socket.io/1/websocket/qRpvu5AQFZvju4nIao6m HTTP/1.1