"Swizec, you really didn't have to say that" is second person, not third person. "Swizec didn't have to say that" (or "Swizec thinks he didn't have to say that

"Swizec, you really didn't have to say that" is second person, not third person. "Swizec didn't have to say that" (or "Swizec thinks he didn't have to say that") would be third person. IIRC, there is a period in early development where children frequently use the third person to talk about themselves (likely related to the development of the theory of mind, i.e. the distinction between one's own mind and others, which develops during early childhood too). I'm not sure where the prentiousness comes from (though I'm aware of it), but this style of speech is also frequently used when trying to portray someone as severely lacking intelligence (likely to make them appear more like a child): "Hulk angry. Hulk smash!" comes to mind as an obvious example.