What time should Homeschoolers Wake Up?

The wifie and I have been married to one another for over 26 years ..... and for the vast majority of things, we see eye to eye.  When we don't, usually one or the other easily slides to the other persons point of view with very little resistance.  However, one area that neither of us has budged on is around what time the girls should wake up in the morning.  Val believes that the girls should wake up at the same time each morning, say 7am, get dressed, eat breakfast, brush their teeth, and then start their day.  I'm of the opinion that the girls should sleep until they naturally wake up, then start their day even if that means 9:27 am or 10:11 am, and that if they feel like doing the first half of their school activities in their sleepy clothes then they can.  Brushing is important for hygiene purposes so that should be done too of course, but pajama clothes are fine.    

As I searched out the homeschool social media sphere to gather more opinions (hoping to find more of mine of course), I've found plenty of arguments and "scientific" reasons for both points of view.  They run from the "get them ready for the real world" perspective to "children need more sleep as they go into their teenage years."  It seems there is no "best" approach, just as there isn't a best approach for any one way of home schooling. 

So, here we are ... Val and I on opposite sides of the matter, with equal say into the approach.  Where did we end up?  Well, the girls made this a non issue by simply getting up and handling everything themselves by 8:30 am!  They make their own breakfast, eat, brush teeth, get dressed for the day, and we are into our martial arts training.  Now, there have been some mornings where one of the daughters is slow to get up, and on those rare mornings (about once every three weeks or so), I don't go pushing them out of bed.  I let them rest, trusting that their body must need it.  There are also some mornings where the youngest likes to stay in her PJs until after Karate training, and that's find too.  They are self driven young ladies, so when they slow down .... there is a reason.