It's a shame it has to come to this, but corporations respond to little else quite often. The most d*mning evidence was their removal of Field-Test from Ios4 so regular people could not see the massive signal drop.
This is compounded by a lack of acknowledgment and denial of physics.
They certainly knew about the problem before launch, but not before it would have been very costly to change and fix. They had a choice of pay now, or pay later. Apple chose whichever was less expensive, as all corps do.
People expect different because Apple has a face, Steve, but in the end, the choice was still "what's cheaper".
Dangit.
The most detailed review I've seen yet................
http://www.anandtech.com/show/3794/the-iphone-4-review/2