In fact, the search history, on PAIR (look for 4-11-2013 SRFW Search information including classification, databases and other search related notes) does not say ask patents was used, nor does the search strategy (document code SRNT).
It could be the USPTO has not gotten around to noting this yet, but the only entry I see that could be related is the NPL entry, which of course, has no image available (god i love PAIR), and does not say it came from outside the search.
Don't get me wrong, I think askpatents is great, but i'm skeptical considering how examiners actually work.