It's because Moo extensions use TCP (I don't know about MooSocket, though), which isn't really ideal for online games (It checks for errors while sending packets - If a packet didn't arrive, it'll send it again; While UDP doesn't care if the receiver will receive it or not), only if you're planning on doing a turn based game. Isn't a guy on the clickteam boards doing an extension that uses UDP? I think the extension's name is 'Oinc' or something. You should wait for that, if you don't want so much latency in your game's online mode.