Not surprising really. You could make the same argument with shorthand writing. While it's certainly not the most easily read form for the masses, it has one very important saving grace: For those that learn it, it's often the only way to keep up ... I mean who would you want taking dictation for you? Someone who has to interrupt you to slow down while they write long hand?
I think the lisps with less brackets (i.e. Clojure and arc, that I know of) strike the right balance between readability and efficiency. Racket on the other hand is terrible... I'd rather learn Java.
