They have a full deletion that gets rid of all your shit. Is it still probably saved somewhere like in a database in NSA head quarters? Maybe but it takes like two weeks and then it's fully gone.
And eheath that pie chart is so fucking gay. I didn't delete my facebook because of lack of privacy or to talk about deleting it. Facebook is wack as shit along with twitter and I think it's bringing the human race to an embarrassing, superficial, celebrity butt fuck, loose moral, uneducated, melting pot of horrendous proportions targeted at the masses and I choose to not partake in that.