I guess we will find out soon enough why some of the January 2013 Kingdumb Misery inserts didn't come with instructions about this wastefest. Breaking them up, but still having them 3 days, would put a stop to large pools of people mixing once a summer without cutting back on time wasted or that Friday off from work. When January comes and we see more information about whether there are motel arrangements or they are simply breaking the Grand Boasting Sessions into units of 500-750 members, we will know what is going on for sure.
Then again, maybe someone saw a post that suggested that they didn't have instructions for the Grand Boasting Session last summer and decided to make liars out of "us apostates". I saw them play that game before--posts about reducing pious-sneer hours down to 35 for aux and 50 for regular probably led them to scrap that plan so they they could make liars out of us. Either way, it is entirely possible that they were going to scrap the Grand Boasting Session but preferred to "prove" that "apostates are liars" instead. That is the one caution about predicting what the washtowel is going to do next--they will play that card from time to time to "prove" us liars.