Well, you have to admit that 'Celtic music' is a little more succinct a term than 'Irish, Scottish, English and Other Possibly-Related Folkish Traditionalish Music Until Thirty Years Ago Played Solely With Acoustic Instruments But Now Played Electric Too'.

Without studying his playlists, I'm willing to wager that Gavin is providing some air-time to at least a few deserving artists who are not getting much of it anywhere else, so - I don't care what he calls his show; more power to him (and it)!