My mom ordered it when we went a few weeks ago as an appetizer. It's definitely big enough that it could be eaten as a main course but certainly not "titanic". As an appetizer it would be enough for two people. My mom ate about half of it and everyone else (3 other people) had a bite or two.
I don't recall her ordering specifically an appetizer version (not on the menu) but the waiter might have brought that instead knowing it would be eaten as an appetizer. He gave the impression that it would be a very large dish but it didn't seem big when we got it.