I kept the time allotment the same as it was in the pre-FA mock. I wasn't part of the conversation when everyone or at least the majority, decided on 12 hours but it probably had something to due with the fact that some of our members have radically different time zones than what we have. I tried to remedy any problems that might cause by having that 1000-0600 time period as a down time.
Keep in mind that this mock was scheduled to be only 4 rounds because of what we experienced in the first one. I know many have found this to be a lot of fun and want it to continue and perhaps we should look at that when we decide things about next year's mock. For now though, I'm happy to get in the 4th round before I leave.