For Ghost Recon, TG vs. a normal server is like the difference between the MA and scenarios.  The SOPs make it so anybody can "plug in" to a team and have the kind of mutuality that we have with squaddies in AH.  There is a focus on leadership skills and good comms discipline which results in a very immersive experience and a lot of dead tangos.  I am completely addicted to TG right now.