Will they, or will they have a lot of free time in the morning? Time they could even spend doing homework, giving them their evenings free and clear.

edit: as an early riser myself, that absolutely doesn't mean that I want to go in early. I enjoy having hours to myself in the morning, being able to relax, cook a nice breakfast, maybe watch a movie, before going in. I don't know why it has to be the standard that we be in a frustrated hurry every morning.