A few days ago I was reading a book, by an American author, that had a recipe for 'Shepherd's Pie' and was amused to see it used minced beef. Then I happened to catch an episode of Rachel Ray where she described a Shepherd's Pie as being made with any ground meat and topped with potato mash. This really, really bugged me. Being the nerdy, pedantic wordsmith that I am, I just have to say it...
The only meat in a Shepherd's Pie is LAMB (hence the 'shepherd' reference).
Cottage Pie is made with minced BEEF.
Anything else would be called a potato-topped pie.
There. Now I feel better.