Couple of things:

1 - Irish and Scottish varieties of Gaelic have been separated for over 800 years. While the Northern parts of Ireland and the southern areas of Scotland's Western Isles can "understand" each other to a certain extent due to the closeness of the area, the rest of the regions are not mutually intelligble easily.

2 - It IS Scottish and not Scotch Gaelic as mentioned above.

3 - Cape Breton is NOT the only place Immersions take place, but it is a spot that gets used. (Not sure why.... 8-))))

4 - Gaelic numbers ARE down, all over, but there IS still hope.

5 - Ingrid Henderson is NOT a native speaker (neither is her brother in the Blazers), though they both have learned enough to understand what is being said. I'm not sure they can make themselves understood in Gaelic.