And how do they know what the celebrity's type is?
I think they guess, I'm not sure I go along with idea that types look alike. Seems to me a whole different set of genes would be involved. Facial expressions may correlate, but that's about it, I'd have said.
Someone in Russia did a study on this, and had several photos of Russians of each type. Damned if I can find it now. It was interesting, as there were definitely typical "looks" to the facial expression on the different types.
I just remember that the ESs all looked like really nice, friendly people, and the INs all looked like serial killers. It was awesome.
I'm not a procrastinator. I'm a long-term planner.