Confirmed (but no mention of stealing):

http://blog.osmfoundation.org/

though there is this:

  "It’s also missing the necessary credit to OpenStreetMap’s
   contributors; we look forward to working with Apple to get
   that on there."

I guess there is an outside possibility that both teams are using the same Ordinance Survey Data (although this seems unlikely now that the OSM Foundation has chimed in, I suspect they would have checked this before announcing Apple's welcome).