I mean sure, and their lineup has changed with the x3d chips, but I just mean $279 for the x600x line isn't the most expensive they have launched at. I don't see how it is a 'dissappointing' announcement, especially when the prices are naturally going to settle at a lower price most likely after launch anyhow.
They just don't outperform the 7000 series and they are kind of more expensive. I guess you can PBO them and get 15% out of them at similar power consumption but that isn't great for the price difference.