My experience with socialization has been a bit different. I think traditional schooling provides a few key things that are more difficult to come by for homeschoolers.
Let me say first, though, that I am glad that my kids' model for healthy interactions is primarily their parents. We try to be calm, clear and kind in our interactions with others and I'm glad our kids have that as a baseline (rather than the example of their peers).
Also, my first two kids are wildly different in terms of social interactions and they are the product of the same schooling. So there's a major component of nature here as well.
Three things homeschoolers may need to work harder for?
1) Opportunities to take direction from other adults. My strong-willed child and I have an understanding and rarely have power struggles anymore because I know how to avoid them. However, I actively seek opportunities for her to respond to other adults so she can practice handling what she views as unreasonable requests/demands. They're a part of life, after all. Likewise, not every adult is fascinated by what my 6 year old has to say. Lots of adults would just like him to sit still and listen, and he needs to learn that as well.
2) The critical eye of peers. Bullying is no good, but homeschoolers tend to be extra polite and accommodating so some negative behaviors needlessly persist. Sometimes having a peer "check" an inappropriate behavior is far more effective than a parent's efforts. One kid your age telling you your breath smells might be all it takes to start paying attention. My daughter has a blunt friend (not homeschooled) who will matter-of-factly tell her when she's being too loud or overwhelming. It's awesome.
3) Cultural competence. This was really lacking in the homeschooled kids I knew growing up, and I know my kids will struggle in this area as well. We don't watch tv and they spend most of their time with their family so they are mostly clueless about the latest toys, music, movies, etc. This is obviously by choice to a large degree, but I recognize it can make making friends a little trickier at least during later elementary school and junior high.