These are mine own personal observations:
I'd attended two schools for the deaf. I would not trade the expereince for anything in the world. If anything, I'd understood my parents better (with their institutional-style parenting toward me).
I'd noticed, remarkably, that those who'd attended oral schools then attended deaf schools that'd employed "total communication" as an enforced method of communication . . . these kids lacked in social skills as much as they'd excelled in education.
Deaf schools, when I was attending, sought to rectify the imbalance by employing mainstreaming (for "exceptional students") whilst, also, employing deaf school benefits.
Deaf schools are one of the foundations/pillars of the Deaf Community. I dare not deny its value because I've experienced it. Mainstreaming (something I'd, also, experienced) is a benefit that leans toward social isolation and excellent education. In short, it would appear that if you were "mainstreamed," you'd be as smart as your hearing peers while devastatingly lacking in social skills.