I think your post is a bit misleading; in the OCaml example, both functions are curried. This would be a better juxtaposition (I'm mostly guessing at the syntax; I'm a Haskeller).

    let uncurried = fun (foo, bar, baz) -> qux
    let curried = fun foo bar baz -> qux

It's a relatively small nitpick, but that's what currying means in this instance. And really, JavaScript is the same way; a function with "multiple arguments" is really just a function where the argument is a tuple. It's just that syntactically, it's cleaner in JavaScript (and many other languages) to declare and call functions with tuples.