Let's be clear about this, full flow this month means just that, the fabs are flowing fully, this does not mean the wafers are coming out of the fabs yet. It takes about 12 weeks from the time a wafer goes in to the fab to the time it comes out with pretty pictures drawn on it.
This means if they turned the tap on in early September
as Tony wrote, you won't be seeing chips with smaller pretty pictures drawn on them until late in Q4. If the timing was exact, you can expect them in early December, which fits in exactly with what AMD has been saying all along.