The thing I noticed first was that no one sends rejection letters anymore - you just go into the resume black hole (unless you actually manage to get an interview).
I've received a few via email. Pretty much the same wording too.
I had this experience too, the last time I was job hunting, and it seems pretty rude, especially after being told "we'll call you within a week." I would have been happy with a boilerplate email. It would have saved me some anxiety and unnecessary follow-up calls.