Lisp Questions

So I have some questions about lisp. I've been learning programming but I hear some conflicting information so I need some things cleared up.

First of all, I keep hearing that the ability to wrote code others can read is huge, but since lisp is incredibly hard to read, wouldn't that make lisp programmers inherently bad programmers?

Also, can someone post some non-trivial lisp code? Every time I see someone post lisp code it's always something very short and trivial. Is it possible to write anything real with lisp?

>>33
I think CLISP has a S-exp-based interpreter (instead of just compiling the code wrapped in a lambda and calling it), but then I don't think it's very fast. Only reason I still use it sometimes is because of its arbitrary precision floats.