I'm *not* a yank. I live here.
This is a really fun book. It's a long time since I read a book in a single sitting, but I couldn't put this down. Yes, he does have some side swipes at the English (If any of my English friends are reading this, you have to admit that this is fair enough, given our history), but he also has a few (far more subtle) shots at the US tourists who come here. And, of course for the Irish themselves! I laughed hard enough to blow the foam off my Guinness when I read his comment that the Irish were obsessed by their own image, 'which is why a considerable number of them are reading this book right now'...
As for his explanation of the 'Irish B&B'...
If you don't enjoy this book, I suspect you need a sense of hum(o)ur, urgently!