It really depends.
School days: Very, very slow process. I wake up at around four AM, and it takes me about two hours to fully wake up and get out of bed. xP Sometimes more or less. I know that, because when I wake up, I immediately pull out my iPhone [ Sha, I sleep with it xDD ] and it's about four fifteen, almost everytime. Then when j get up and amble into the bathroom, it's six.
Weekends: Wake up at 'round eight to ten, only takes me about half an hour to get up.
Vacations from school: Then, I'll get up at around ten or twelve. If I get up at all. Pretty nocturnal.