This can depend widely on the altitude you are acclimated to (what altitude do you live at, how regularly do you hike/climb/run near the target altitude, etc.),

This can depend widely on the altitude you are acclimated to (what altitude do you live at, how regularly do you hike/climb/run near the target altitude, etc.), as well as how quickly you go. For some, finishing the mountain without having to overnight on or near it is more convenient, but others might overnight so they can go faster on summit day without getting altitude sickness. Side note (I'm not saying this applies to above comment): I'd caution anyone to take 12,000 feet seriously, it's a serious altitude and you want to think in terms of turnaround times and eventualities, not "I'm getting to the top no matter what".