And what even smaller percentage of people go through the trouble of reporting an error event if they do see the curl? It feels weird to pay for a service, and then have to actively work to make it better.. (by paying, I mean buying an ios device..).

Then I understand the release and iterate strategy, and I'm sure it applies in many situations. But when you are Apple and have painfully built a reputation of releasing only great products, you may want to think more than twice before crippling your star product, even if it's just a little.