AMD was not aware of this bug until fairly late in the game, and there was a new spin required to fix it.
Now, memory performance is said to be much better, basically to not blow. Updates on this level mean delays though, and that could be the reasons that the Fs went from March/April to June.
Either way, more performance never hurts. µ
Sign up for INQbot – a weekly roundup of the best from the INQ