When I was doing all of my research before pulling my four children out of school, I talked to my aunt who was retiring after teaching in public schools for over 30 years. My kids were going to complete the current year and then start home schooling the next year. Her response to the "socialization question" was that if I were truly concerned with their socialization I would not let them even finish the two months remaining that year but remove them immediately. 15 years later I still believe it was the best decision I ever made.
My children got to be exposed to public school type of socializing when they played with the neighbor kids. They found out about diversity, bullying, and two-faced friends all at once. They finally realized the kids who live on our cul-de-sac aren't worth their time. My son was even telling me the other day that he never wants to go to the local junior high, since many of the kids there have the same "gang banger wannabe" attitude.