Interesting. If AMD is already sending Steamroller samples out, then maybe we won't have to wait until 2014 after all. But in that case, what's with the weird roadmaps? This is rather puzzling.
I think a few directed tests could prove weather the part being discussed is steamroller based or piledriver based. Since Streamroller features a split decoder, such directed tests would be wise to aim at depicting a Piledriver weaknesses there and comparing with the alleged Steamroller part.