Did you ever get a paper accepted by a journal without any comment at all? It has happened to me twice; both times with a very high-standing journal in my field.
I was initially confused, did not know whether to be pleased, or horrified. I then settled for the latter. In my opinion, this is a terrible consequence of the current publishing model where editors are not necessarily qualified to review papers, and referees do not have either financial or prestige incentives to do a good job.
Is this common? What did you think of this phenomenon?
EDIT: after all your nice answers and comments, and talking to people working in the editorial side of peer-review process, I came to the conclusion that the lack of replies was due to the fact that both papers were - somewhat - interdisciplinary. I understand it is way harder for editors to understand interdisciplinary papers (they are expert in a subject, not necessarily in multiple subjects) and thus judge for themselves and to find appropriate reviewers. If this was true, it would be particularly scary as the most groundbreaking papers are typically multidisciplinary and thus most likely be accepted with little criticism (if the author is already renowned) or dismissed without further ado (if the author is relatively unknown, at least in that area).