From the way I see it, this public statement is for protecting Apple legally. I am not here to troll, and am a big Apple supporter, but Apple dropped the ball on the iPhone 4.
Apple just admitted this issue effects all iPhone 4's, so people saying I have 5 iPhone 4's and this problem only effects 3 of the 5, you are wrong.
Apple next tries to "down play" the issue by saying this problem exist on the iPhone 3GS, and other phones like the Android, etc. This statement is more for legally protecting themselves.
Apple follows to explain how simple the issue is to fix, they will start using an AT&T calculation for representing bar strength and change the look of the bars on the iPhone. If this issue is simple to fix, and Apple is using the calculation that AT&T is providing, then why is this software update going to take a few weeks? If Apple does not get this software update out earlier, A) It is either not as easy as they say it is, or B) they want to make customers wait past the 30 day return period.
If I was AT&T, I would be pressuring Apple to fix this problem correctly, but who knows what AT&T is doing. The way I see it, AT&T will loose a lot of customers to the Verizon version of this phone if it does come out in January. Users who are stuck (past the 30 day return policy) with the iPhone , because they believed Apple will fix the problem with a software update, may be able to break the contract with AT&T, but it will require some serious arguing about service quality and AT&T failing to provide their part of the contract agreement. Also good luck in receiving a full refund from Apple after the 30 day return "window".
Next, from a stockowners point of view this is scary. Apple, will eventually release a new iPhone, iPhone 5 or "iPhone Verizon". If they release an "iPhone Verizon" Apple may be able to make changes to the antenna design, and argue that the changes were required for supporting the CDMA technology. However if they release the iPhone 5 or a new revision of the iPhone 4 with changes to the antenna, then I see it as Apple admitting there is a hardware design issue and will be sued for the iPhone 4 rev A antenna issue.
Overall, I think Apple needs to do a recall. The statement released today was because of the class action started yesterday,and that is it, it was not released to appease the customers. Apple put a clear non-scratch non-conductive coat on the antennas, and move forward. The earlier this is done the less money it will cost Apple.
We know one thing, the next iPod Touch is going to be great!