Most clans are for this purpose but to differing levels of actually implementing it.
BRD for example is shield wall shield wall shield wall and occasionally time coordinated charges with cav and infantry down to seconds. Love them or hate them for using that one shield, they are coordinated no matter how you look at it (Regardless of battle skill, they use good tactics...). Other clans fail miserably at this. Several clans even say in their description that they promote teamwork but in practice you see pairs of people and a general "loose" plan at best. While some clans do seem to be better with "loose" tactics and work wonders (Like RS) the vast majority fail at it. Looking at ATS for example, I have never seen any indication that they use TS/Vent for coordinating planned assaults beyond their cav sticking together.
I am not saying that every clan is unorganized, I am merely saying that the majority use "tactics" that I disagree with.
No problem 
I am really looking forward to this actually, as I have a preference for organization, heh.
Ahem I would like to take this opportunity to promote the awesomeness of the Eastern Tsardom, tag TS. Come fight against us in seige!
I promise all of your team work and tactics dreams will come true. Unfortunatly TS really stands for team stacking so while you will be able to see it the experience IS limited to clan members only, and maybe some pubs.
Poll