I havn't heard John Duddy speak no.. I've heard a couple of really strong Irish accents, and if they talk fast, you can very easily miss a whole sentence trying to figure out what the first word they said was...
I'm trying to think of the boxer that moved to Las Vegas and fought Morales and Larios... His name has totally escaped my mind right at this second, but he's from Dublin and sometimes he was a little hard to understand... (i'm going to be trying to remember his name all night now)

In the movie Snatch where they have the "Pikey's" with Brad Pitt, I always wondered if anyone over their has accents that are that strong... It's almost like a different language..