From the minute you step in the door, it's pretty obvious that this is a chain. The nice thing about pubs in Ireland (lived over in the UK until I was 21, so I've been to a pub or seven) is that they may be owned by one or two brewery's, but they each have their own feel, menu, and clientele. Also, I've never seen a pub in Ireland with the servers wearing Scottish kilts; come to think of it, I've never seen one with the servers wearing Irish kilts either. The place lacked the craic (not a drug, the other kind--fun, enjoyment, abandonment, or lighthearted mischief; often in the context of drinking or music).
What I really want to know is what the heck nachos were doing on the menu in a so-called Irish pub. Just because potato wedges were substituted for tortilla chips doesn't mean the dish is now Irish. Oh, and what was up with the Cheese Whizz crap they put on top of them. On the bright side, the boxty wasn't bad--basically stewed beef (cooked with Guinness) in a potato pancake.
Suggestion: a live, Irish band might make all the difference to D'Arcy McGee's, but I'm not in charge of marketing. In the mean time, if you want a place with a somewhat more traditional Irish pub's atmosphere, go to Rula Bula on Mill Avenue.