Boys are more likely to act out, certain personality types are more likely to complain. This doesn't mean that the needs of quiet students are being met. Maybe your daughter is quiet because she feels a huge gulf between herself and her peers. When she's with her intellectual peers, that problem may disappear. Kids in schools with a better gifted program than the ones where I have worked tell me that when they are with other gifted kids, they don't care about how old anybody is.
I had a friend in 8th grade who skipped three grades, went to college at 15, dated several classmates, joined a fraternity, and went to an Ivy League for his PhD. I've also known at least one person who skipped a few grades, dropped out of graduate school, and has a difficult time holding a job. I suspect that individual is on the autism scale, and he is not offended when I suggest that. I'm just saying that some folks will have social issues whether or not they are accelerated.
Every kid is different. You have to make your decisions based on what you know about your kid.