Depends on the kid. DD8 is in honors geometry in 8th grade now and will go to high school next fall for algebra 2. In aleks she is in precal. She does Aleks on the side now for kicks.
Socially it's not a problem and academically it's not a problem. She has middle school friends she goes out with (dinner/movies). Facebook is a great social tool.
She asked to take algebra 2 and precal next year and it's just a matter of scheduling. Head of math department is trying to work out a schedule that would work. Don't know if she gets the 2 courses she wants, but she will be at least in algebra 2.
