Yeah, that's usually more of a form rejection.
If they do respond with comments, they'll usually go into some specifics, but don't expect a big, personalized break down. On past rejections for full-requests on other books, I've gotten all kinds of feedback, like "Writing is strong, but second half structure is too problematic," or, "World building concept is good, but I wanted the book to represent this aspect of it much more." They'll spend some time telling you what didn't work, but they won't go on for paragraphs and paragraphs about it, unless you were a really near miss, in which case, they might expound with much more detail, and probably also ask to you keep submitting in the future, if they're not outright asking for a revise & resubmit.