No one outside of AMD has sales numbers.
But look at the way the launch/reviews happened. The reviewers only got 2 days with the cards before release, there are no partner cards. AIB makers when contacted stated it will be some time before there are any AIB cards.
Everything points to manufacturing just starting up, rushing out the first small batch of cards to reviewers and stores, so they can get the launch in as early as they can.
Normally manufacturers run manufacturing for some time to build up a big early stock to handle launch, so there is no problem getting cards to reviews well in advance while the launch supply builds up.
Everything says to me, that they launched VERY early right after starting production, perhaps only days after the initial run started, giving reviewers the first cards off the run, and little time to review them.