Leadership does not come from wearing a letter. Wearing a letter comes from being a leader. True leaders don't require a letter to be a leader, they do it anyway because they are who they are. I'm puzzled and maybe a little disappointed to hear O'Reilly saying he didn't step up and be vocal toward the end of the season. If Gionta wasn't saying or doing the things necessary to clean up whatever poor behavior was going on, then O'Reilly is one of the guys that should step up. Okposo being that guy just shows why letters don't really matter.
Okposo is a well respected guy that is probably much more mature than most of the roster. He'll be a leader no matter what, but if nobody else displays that leadership he sure as hell should wear a letter. His on-ice performance (was good enough for me under Dufus) has little to do with the off-ice stuff where true leadership is required. Who's going out too much or too late? Making poor decisions, can't be on time or cuts it too close often? Who is having personal problems affecting practice/play? None of this crap requires a guy that puts up 7 pts every 10 games like clockwork. It requires a guy with maturity and some life experience that can command some respect and be a positive example.
If more than three guys (7,8, whatever) are like that, then it doesn't matter who wears a letter. The leadership is there in the locker room regardless. If there's only a couple guys like that, then maybe it matters more. BUT...choosing the wrong guy to wear a letter will NEVER prevent a TRUE leader from being a leader. If there are too many punks that choose to not listen to a true leader because he doesn't wear a letter, then it's time to clean house and keep the leader (letter or not).
Leadership is a collective commodity that transcends the rather shallow step of stitching an "A" or a "C" on someone's sweater. A team will either have enough, or not. The lettering is a small and minor representation of who is a part of that leadership group. Fans get way too caught up in that aspect of it, and are never really privy to know who the respected voices are behind the scenes.