I agree with Jay on the cruller issue. And on triple decker vs three decker - either/or will do. But grinder?

Around here it's a sub or a spukie. Isn't a grinder something from a chain with shredded lettuce? Maybe not, but I don't remember the term growing up in Boston. To me, a grinder seemed to be the sandwich equivalent of Greek pizza -inauthentic.

The author of this page devoted way too much time and effort to a scientific study of how sandwiches get named in different regions (scroll down, it gets better.) It's unintentionally hilarious, but here's the useful part:

The submarine is a sandwich on a long roll, split in half. In its basic form it is filled with cold a variety of cold cuts, cheese, shredded lettuce, peppers, onions, salt, pepper, oil and vinegar. In addition to the general term submarine or sub, local terms in current use are grinder (New England outside of Boston), wedge (Westchester County), hero (New York City), torpedo or torp (Albany and Troy), hoagie (Philadelphia), zeppelin or zep (Norristown, PA), poor boy (New Orleans). ...

Alas, nothing on spukies. Here's more on regional variations of the submarine. And then, in a league of its own, there's the Horseshoe, not found much outside of Springfield Illinois -for good reason, I suspect.

UPDATE: Wikipedia has its own Supkie page and even more controversy on subs.

"A small town will usually be the host of 2 or 3 sub shops.[citation needed] Larger cities have 2 or 4 sub shops per neighborhood.[citation needed]"

Sounds definitive to me.