I'd have to second what Malcom said. Irish music and dance are the "fashionable" folk...for the moment. I had heard that Cuban music was making a play for that spot, however.

As for Scots Gaelic culture, music, and dance, from where I sit, I see quite a lot of recognition of it. There are more Scottish heritage festivals that I am aware of than Irish. I have never seen the Irish equivalent to Highland Games here in the States. And, Bagpipes are immediately recognizable as being Scottish, but how many people know what an uillean pipe is?