FUD Zilla heard the ATI Radeon HD 5700 series might sell much better than the Radeon HD 5800 series because the latter one is still in short supply.
. Both series are selling quite good, but partners are still complaining about the HD 5800 series, as AMD simply can't produce as much cards as partners need.
The HD 5700 on the other hand is quite good, it delivers quite a "bang-for-buck" and also brings all the features, like DirectX 11 and Eyefinity, that you can find on the HD 5800 series. Availability for the HD 5700 series is decent and partners had their cards delivered to retail/e-tail shops days before the official announcement.