I agree. Have a look at hallo (a really basic inline editor). The coffeescript (https://github.com/bergie/hallo/blob/master/examples/hallo.j...) is 236 lines, including about 60 lines of comments. The javascript is 208 lines, with no comments, and extremely clean (https://github.com/bergie/hallo/blob/master/examples/hallo.j...).

I think the big advantage of coffeescript is it gets rid of the whole "implicit global variable" thing. It's not a completely new language (like pyjamas - a python-js converter) just bit of syntactic sugar, which happens to make mistakes a little harder.