not wanting to get shot down in flames but some semi-personal experience...
my neice was home edded for a while afetr being bullied in school (from about 10-12 ish). I wouldn;t home ed my DS (apart from teh obvious reason that I have to work) because I just think she got a very good education and she never really caught up.
Maths and English fair along with history, some science OK as my brother is pretty scientific. languages appalling as she was limited to languages they could speak (ie none fluently)
She went back into a different school at 12 and settled fine - but was very behind in almost all subjects. She worked hard to catch up in most but the school said she was just too far behind in languages to take them for GCSE and she really wanted to tkae German - she just couldn't catch up in every subject and something had to give.
Her education was biased towards things that my brother or SIL liked or knew and didn't discover until too late that she liked things they hadn't even considered.
She scraped through her GCSE's but seems happy enough now.
Don't think they were the best home edders perhaps though. Think they underestimated how much time you have to spend and how disciplined you have to be - if she didn't want to do it, often she didn't do it and had no home work because otherwide she'd have been cooped up at home most of the day and the evening too.
I felt very strongly about it at the time as I felt they reduced her options and the bullying could have been dealt with another way.