gah! you're right! I've attempted to update my comment with corrected code, but given my caffeine and sleep deprived state there's a good chance it's just as wrong as my original effort :/
You're joking, right? If not, then you're trying to generalize one line of shitty code and one mistake of a tired programmer to the whole language - and I don't believe you'd want to do that!
Clever or hard to read code is just that. I don't use CoffeeScript but I wouldn't use this example to be mean about it. At the end of the day, it is an acquired taste. My only concern is I don't have the time to invest to make a decision on it and I would suspect others are in the same boat. So, by default we choose a tentative no.