This is actually true of Lisp and Scheme too, though, since nearly everybody indents their code the same way (how Emacs does it). Code with lots of small functions, long and relatively flat imperative code blocks, etc. has very distinctive shapes.

Come to think of it, that's true for most languages that don't have Java-style static typing annotations interspersed throughout. Functional and imperative code in OCaml or Lua code look noticeably different, too, and there's not a whole lot of stylistic overlap between OCaml, Scheme, and Python's syntaxes. (Lua's is relatively similar to Python's.)