Network Topology: Fully connected mesh?

hi,

the architecture of multiverse is very interesting and I'm trying to understand how the message system works.
1. If a new agent connects to the domain server, a broadcast is send to all existing agents:
https://github.com/multiversemmo/MultiversePlatform/blob/7e1aad33d48b9e47f3db2ca638cb57592336ddb7/server/src/multiverse/msgsys/DomainServer.java#L465-L476

2. The MessageAgent receives the NewAgentMessage and connects to the new agent:
https://github.com/multiversemmo/MultiversePlatform/blob/7e1aad33d48b9e47f3db2ca638cb57592336ddb7/server/src/multiverse/msgsys/MessageAgent.java#L1729-L1743

Is my understand right, that this is a fully connected mesh, where each agent is connect to each other agent?
This is approach is very easy to handle, but how does it scale?
What is the maximum number of MessageAgents? Do you have any benchmarks?

Best,
cyby