Our main goal is just to build up a solid player base of people who don't suck at this game, under the assumption that if they want this team-based game to succeed in any way, there will be clan support before it goes live.
That being said, they've mentioned more social options/clan support as something they are definitely working on, they just didn't drop too many details.
Clans are going to dominate this game as usual. Having an organized attack / defense is much harder to overcome. With communication being key, winning with "randoms" is ALWAYS harder to do. Being able to communicate with all 6 (or 8 I hope) of your team members is the most significant factor.
And Malon, that's not right, fat girls need loving too.....
I think the various clan-leaders are simply trying to get a head start with the clans. It's true there is currently no clan support in the game, but I'm sure there will be in the future; if not during Open Beta, then definitely at Launch. Arad1, Ghost Recon Online's Player Experience Manager said in this post "clans are definitely of high-importance," so I think it is a matter of "when" and not "if."