So I have argued that these kids are going to have social issues no matter what (I know from experience with DD9), and that they will be worse if we do not meet their needs academically. I am able to give them personal examples from DD9.
While I truly sympathize with the annoyance of struggling for early admission, I don't think the blanket statement that "these kids are going to have social issues no matter what" is fair. Your experience with DD9 may have lead you to that conclusion, but my experience with HG-PG kids has not shown any difficulty with social interaction. I even wish I hadn't heard this repeated so frequently leading into K because it terrified me that my kids would never have any friends.

Thankfully, my kids were much better at finding friends than I'd been lead to expect.