Yeah, I heard Tina say as much on the late night talk shows, but the truth of the matter is she's more than a writer, she's a veteran skit comic, and that was a comedy skit in which she would have killed had she still been one of Lorne's minions.
And with Tina there's also a degree of her wanting to share the limelight with her friend Amy given Tina's post SNL success with 30 Rock and their long history together.