Mostly I find myself unable to generate an opinion about whether or not we'll homeschool for high school because I can't begin to imagine my small children becoming teenagers, passing through puberty, growing arm-pit hair. Apparently all kids eventually do, but it's beyond my mental grasp.
Today, though, someone presented me with a compelling argument to homeschool older kids. Basically it is the socialization argument all over again: high adult to child ratio, many models and coaches for appropriate conflict resolution skills, multiage groups and family attachments. Except apparently the stakes are higher once you add in teenage hormones. Here is her article in full.