I always find these threads meaningless. Not all thermostats are the same, not all houses are built the same, and not all thermostats are placed in the correct sections of the house.
I've been to houses that have it set to 69, and it's adequate and comfortable. I've been to houses where 74 is chilly. I have a new house (Central FL) and it's always set to 77-78 when we're home. 79-80 when we are not.
And I have a thermometer gauge that reads it correctly in numerous rooms, especially at the thermostat location. In other houses, the readings are all over the place (poor HVAC vent balance) and often times the thermostat is in a warmer part of the house, so the AC constantly runs and thus is required to be kept at lower levels. So my 77 could be another person's 73 - huge difference, and also a huge difference in electric bills.
Basically, these threads are meaningless, but fun.