Cory, you're quite right, I should have been more specific. It wasn't 'all'. But I think htat those who recommend downplaying what has happened to the OP's dd run are effectively doing the same thing.
Personally I don't buy into the idea of innocent/not innocent (innocence is a bit of a loaded word tbh, and has been semi-sexualized already I think)
I do think, though, that while I wouldn't express what has happened to the OP's dd as a 'loss of innocence', she is right to take it very seriously and that actually, being bright and breezy about it is NOT the right way to go about it.
The world of porn, as it exists at the moment, is a deeply scary place, if you actually look at it with a clear eye; for a 10 year old you can multiply that by whatever.
She will be struggling with what she has seen, which could quite poss make her very anxious about her own developing sexual feelings, and she may well be feeling that the 'result' of those sexual feelings would be the kind of sex she sees portrayed in porn: ie sex which involves one party exerting power or control over another (I really don't just mean s/m stuff, obv, just the basic 'yeah, bitch, you love it' stuff).
If it were me I would really want to talk to her about that.