Socket.io in-order message delivery warning still valid?

Hi,

I'm planning to implement a real-time collaboration platform using ShareJS. Since the documentation seems to be a bit outdated, I'm not quite sure whether the warning "Danger danger socket.io does not guarantee [in-order message delivery]" is still valid.

With version 1.x socket.io introduced major changes and therefore I'm asking myself if it might have changed its message delivery properties. However, I was not able to find any information about this.

Is there any new information regarding the compatibility of ShareJS and socket.io?

Thanks!