I just got back from a trip today, and the ISM had been aware of the new seats for quite some time. As an interesting note she said that the isle width will drop down to 17" in BF, and they have to redesign the 3 tiered cart for this reason. Please take it with a grain of salt, as the rumors among F/A's are not always reliable!
Also wanted to mention the leak of the picture has been flying around with the F/A's as well. We are just as excited to have a new BF seat as the passengers!