This is an interesting article. A couple other things caught my attention.
Witherspoon acknowledges that she has always been incredibly driven, and has felt a deep need to prove herself to other people.
This seems to describe an NJ to me. I've said ENP's can appear driven, but they don't appear this way when young. Being P's it takes them longer to realize a vision. Here is another thing that caught my attention:
As a child, I made great grades in school and had some friends – not a lot of friends, but a significant number
Somehow this doesn't quite fit with our earlier ENF typing. Aren't ENF's considered the type that can most easily make friends? It could be nothing, but when you put all the details that we've said about her together there is only one type that fits all of them.
-Puts a high conviction on her values which is typical of NF's.
-Can be very neat and particular like a J. (Must use coasters, immactulate manners, neat drawers, etc...)
-"Appears" to be an extravert
-Has a keen awareness of people like someone who has perception as a dominant function.
-Independant, and gives children more independence than a typical ENFJ.
-Driven even from an early age. (A trait which describes NJ's).
-Has great social skills and knows how to work a room.
-While growing up she had some friends but not a lot.
-Notoriously hard to type.
There is only one type that possesses all of these characteristics: INFJ. But you are thinking, "How can she be an I when she clearly looks like an E?" It's very common for INxJ's to appear as extraverts. This is one reason that INFJ's are notoriously hard to type. To many people they appear as ESFJ or ESFP.
Also when you consider the INFJ type, we were all right and all wrong at the same time. Proteinmix said ENFJ, and was only off on E/I (which is very easy to do on an INxJ). Usehername said INTJ and was only off on T/F. I said ENFP, so I only had NF right, but I thought she was a dominant perceiver. And to everyone who said ESFJ, well INFJ's are often mistyped as ESFJ. It's like we all saw a different aspect of her, but we couldn't put all of our ideas together in a way that made sense. Now after putting all of our ideas together I believe she is an INFJ.
