(Why do I have the feeling I'm hearing 'bb' all over again? I guess we'll wait & see...)
Charlesf, the players here are well versed in a lot of alliances and moves. Lepantos and juggernauts (R/T alliances) are sniffed out before the end of 1901, Key lepantos are sniffed out as well.
In games where there isn't a bunch of newbies, they usually end in draws (mostly 3-way draws), because players aren't afraid to switch alliances and don't like being solo'ed on.
The communication is usually pretty high, and there isn't any 'listening into' conversations like you can in f2f dip.
And, as gramilaj said, there are often 'nmr's (no move registered) or 'cd's (civil disorder... no moves registered for 2 consecutive years without even logging into the game), especially in lower level games.
Honestly, there is no harm in joining a game. If you run out of points, you'll get 100 put back in your account, so go out there, find a game with vets, and try it out. Or, make a game, put in 5 day turns (if that is what you are used to), publish the game here, and, hell, I'll join in :)