I posted this on that other discussion as well.
Back many years ago it struck me that there was a style, I suppose it could be called the Mary Bergin school, that I heard among people who played High Whistle as their primary (or sole) instrument, but there was a quite different style heard among people whose main instrument was the Uilleann pipes.
This was a highly ornamented style characterised by frequent use of "double cut rolls" and other whistle ornaments. I suppose these pipers, whose piping was rich with Uilleann pipe ornaments, wanted a more ornamented sound on whistle and achieved it through use of whatever techniques worked well on whistle.
Obviously being in California in the pre-internet age meant that the people I was hearing was limited, but let's take two, Paddy Moloney and Finbar Furey.
I would think this is Paddy Moloney playing, notice the double-cut rolls on A. There are other tunes where he’s doing those on various other notes.
Obviously he could do those on the pipes, but when he’s playing pipes he would do staccato triplets etc rather than the legato double-cut rolls, which his whistle playing was full of.
https://www.youtube.com/watch?v=ha__hmigsnk
About Finbar Furey, here at 4:12 hear him play double-cut rolls on almost every note. Once again, he’s obviously capable of playing a tune on the pipes in that way, but on the pipes he usually does pipe ornaments.
https://www.youtube.com/watch?v=IiUE4oAoReA&t=34s
So it seems to me that whistle style can also be influenced by what your primary instrument is.
BTW those "double cut rolls" happen to be a standard technique in Highland piping, especially connected with Hornpipe playing. I've even heard them called "hornpipe triplets" and throwing them into, say, jigs might be viewed as a bit gimmicky.
