In my game, I'm using the physics behavior for a custom platformer type gameplay. The problem I hadn't thought I might run into is that the physics behavior lags between the host and peer to a ridiculous extent. Obviously using input prediction only makes it worse, and makes the peer jump around quite a lot.
I'm quite sure that my 7mbs dl speed is not the issue, but maybe the server I'm using is? I'm using the default Scirra server for now, because my game isn't even in beta yet, so I don't need a server yet. If this issue is because of the Scirra server, then no problems, I just have to see if there could be an issue with trying to send physics through a server, period.