Does the new AWS ELB (load balancer) work with sticky sessions? Has anyone used it?

Amazon have done a big update on ELB:

I’ve heard in the past that ELB couldn’t be used to front Meteor apps because it didn’t support sticky sessions with websockets. Does the new ELB solve that? Has anyone tried?

Further Googling has conflicting answers. This saying that the stickiness isn’t across protocols (i.e. crossing from HTTP to websocket connections), but then going on to show it works. And here’s others getting it working with