I'm not against named arguments, but I hate the way they are delimited with space and colons. It would be readable if it were being used in a magazine article, but I find parsing its intent with my own eyes very difficult.

Here's my problem with it:

        -(void) what: (int) kind of: (int) bullshit isThis;

IMO, that is very difficult to read. And try doing a multi-file search for calls to it.

IDEs can overcome the search problem, but the readability problem remains.

Fine language in many ways but I call 'Boo' on the method syntax.

Obviously you hold the phone with your penis.