I'm a regular listener - I've heard an occassional slip here and there, but never a full onslaught of bad language on any show. The chatroom can sometimes be a little harder to control, but I think they do a good job.
Eh. Potatoe, potauto. F, Mf and a few more were, and still are not what I would consider professional...at all. Especially when you have no clue as to the gender, religious beliefs or moral background of your listeners.