Where does consciousness reside and how much cortex does one need to be conscious?
Like most, you play at being a medical expert but even the medical experts are confounded by cases where folks have almost no cerbral cortex and yet test above average on the Stanford Binet.
Presumably you can explain how a fellow with just several of mm's of cortex can score 115 on his IQ test becuase nobody else can.
I make no pretense of being a medical expert. Those test takers of which you speak are not lying in a bed for 15 years thus are not comparable to TS except in having the shape of a human.