Playing with that broken jaw showed leadership by example. Now, the continual false starts up to this season and being part of an average team (outside of 07/09) while giving complacent PC answers to his mistakes after the fact won't help his cause either, so you may have a point there. But Witten is a tough SOB who can only help by leading by example. Witten doesn't seem to have "that" kinda of charisma needed from a vocal leader. Tony on the other hand, is Tony, who lacks some of the coveted (straight edge) aspects to leadership some of us wish he possessed (staring at the monitor alone on the bench after a bad play for ex) but that shouldn't be exclusively on him either.
We still have a bunch of choir boys on the squad outside of Dez, Fred, Leary, Wilcox, McClain, Scandrick (by example), and Lawrence, along with a few others I'm sure I am missing. This group above will likely become our future leaders that bring some of that nasty edge (and vocal leadership) we covet. It's nice to know guys CARE, but is even more ensuring when you see teammates supporting players while trying to ensure accountability. Outside of Dez, no one really has the skins on the wall to carry much weight but I see that group becoming our new leadership in the next couple of seasons.
But the evidence prior to this season spoke for itself, leadership is still finding its way among this group of players with McClain showing a natural tendency, Church being the likely current leader (replacing Lee) though an avg player, with Dez/Fred as the more vocal/expressive leaders on O.