I was chatting with a friend about triplets in traditional tunes and then he sent me a link to this Chieftains video featuring Matt Molloy. It was beautiful but things started picking up around 1:10. This man is no mortal!
How can you play two sounds with one instrument? Listening closely will tell you at not only he is playing in a breakneck speed, he is also able to make the flute sound as if there is a fiddle there.
Triplets add bounce to the sound. And if it is played skilfully the way Matt does, oh boy it really sounds amazing.