Well those leaks showed presentation material wich is real and confirms the existance of a 16core but AMD can always chose to launch or not a product a the last second so yeah i don't see the contradiction here . AMD chose to not launch the 16cores part that doesn't make those leaks any less true !
My only point was that we shouldn't take leaks and rumors as facts. I could also be very wrong, they may announce it at the very end of the event. The leaked material looked weird to me, like it had been poorly edited.