Mary is my first "completely homeschooled" daughter. She recently took her first standardized test and scored in the 95th percentile. I don't put much stock in test scores, but my state does, so I'm jazzed. ;)
To top that off, here's a nice article in the Aussie news: Top marks for home-schooling (though I can't believe they *still* had to bring up the non-issue of socialization at the end of the article).