Pedantically, maybe. But the host of the match lobby was randomly selected and it could have been any of the peers who end up as the host. When the host leaves,

Pedantically, maybe. But the host of the match lobby was randomly selected and it could have been any of the peers who end up as the host. When the host leaves, one of the remaining peers becomes the new host. So, all peers have the capability of being client and/or server. That sounds like p2p to me.