What do you think is considered normal return rate of faulty devices for a consumer electronics company, 0.0% or more?
At Antennagate, Apple stated that the 3GS had a return rate of 6%. Unknown how many were returned due to faults, but Apple historically has had failure rates anywhere from 1% to over 15% (for a bad batch of disk based iPods, IIRC).
9 out of 10,000,000 is not an issue that points to a general flaw ...
True, but we don't know the actual percentage. "Nine contacted Apple" was a cherry picked number that studiously ignored other contact venues, and is unlikely to be updated even if it was in the hundreds by now.
At the same time, perhaps the news coverage will cause people to be more aware of the possibility and thus more careful.
We'll probably have to be patient and see what happens long term. E.g. will the complaints rise or fade away? Will Apple update the design or not?