[tom_mellior]

> However the only thing separating someone at the top of the field from an average expert is intuition.

Intuition based on knowledge and experience. Paul Graham seems to have no programming design experience besides Arc, no apparent knowledge acquired from study, and thus no basis for his intuitions. Which is why, as you write, "his intuition for programming language design isn't as good".

There are plenty of people with a similar level of knowledge and experience who disagree that brevity is everything. And for that matter, insisting that brevity should be measured in "AST size" rather than lines or characters seems objective and technical, but different implementations of the same language can use different AST formats, so this isn't the meaningful measure it's made out to be.