The notion that Python and Ruby are successful because they are like Lisp is absurd and laughable. The reason people are productive with them is because they are very high level languages that have easy, concise syntax, useful built-in data structures, and good supporting libraries and bindings. Gee, go figure.
I LOVE python. But I think Lisp is one of the shittiest, most annoying languages on the market today. When I code in Python, I feel NOTHING like when I code in Lisp. Lisp needs to just die and blowtards like Paul Graham need to stop peddling their tired zealotry to people who know better.