If true, that could explain the extra long BOC meeting today @ MU. 6 years doesn't really lock people down that hard but 13 could do it.
I heard rumors about this as well...apparently, Mizzou's "last ditch" attempt at negotiation included the extended rights deal, limits on Tier 3 revenue (some sharing, at least) and prohibitions on HS content on the LHN. From my (very limited) understanding, the last one was the dealbreaker.
The "extra long" BOC meeting dealt with a lot of non-conference affiliation issues, and I think the outcome (if not the final vote) wasn't in doubt.