My wife says that they were all incredible awkward to be around, so there may be something to the social thing.
You have a point there. In regular school you are forced to be 'social' or risk punishment. I put 'social' in quotes because I think what is considered social is subjective and mostly made up. But watching how people are treating one another in this world I'm not sure if that social component is really working out good. Homeschooled kids are definitely not as slavishly as the 'socially' drilled kids from regular school.
Behind? In what? We are homeschooling our daughter. For her age she's amazing with computers, english and painting/drawing(which is her passion), and also unlike her peers at school she learned to enjoy life long learning and has become autodidact as well. She never learned the usual things taught at school like: forcing other people what to do, bullying, all day on social media, hate to learn, etc, etc..