since the client cannot connect to the central server it tries the supernode ip's stored in the Connectioninfo registry entry.
if there is a supernode which accepts the connect (probably a running 1.3.3 morph) it can connect to this p2p island (870 user).
on the other hand - if one or 2 are running a supernode without connection to central server. and others know the ip and enter it to the connection info so their client is automatically connected to this node- it should be possible to manually setup a private isolated p2p net with 100% searchability.
indy