This group is amazing. Bunch of total wild *** guesses proclaiming to be facts.
1. This is a hardware issue, firmware issue or driver level issue stemming from hardware. That is a fact based on deductive reasoning. Based on apple's own information their support post states this is a problem with the 13" MBP. The fact that this affects only the 13" MBP means it is the hardware, bad firmware as a result of different hardware, or bad driver as a result of different hardware from other models.
2. Apple does not state anywhere this is a software issue. Their customer support stating it is software is not a fact that it is a software issue. These guys are not engineers, did not produce the hardware or the software and we have no official confirmation from Apple engineering.
3. However, Apple will attempt to compensate for the issue in software via updated firmware or driver if possible. They certainly do not want to recall hardware unless they have to. And they will not recall hardware unless it is a manufacturing defect which software cannot correct for (i.e. bad solder joints, bad chip, etc.....). I agree with folks here, whatever it is they will take care of it. But it will take more time than I care to spend dealing with it.
4. Apple support is doing an ok job of handling the issue. It has been raised, they have recognized it, they are working on a fix. Ok. But I am an enterprise software architect for fortune 500 companies. In any place I have worked this would be considered a severity 1 defect (production halt). While staying calm is fair, returing the product if your not happy with it is fair, this IS a serious issue with the MBP hardware. This is very serious for professionals trying to get work done on it. To others points you have a choice, go return it, get a different version, get a Windows machine, whatever. But for this particular model, this is a serious issue and Apple needs to take it seriously. This is not what I would call a quality release and certainly does not qualify as an acceptable production release of a product. Alpha, beta release ok, but production release no way. If you accept the premise that early adopters need to work this kind of thing out and it is normal, then you have a low bar on reality of software engineering and hardware engineering. Apple should not have released this type of defect into the wild and should be directing significant resources towards it and communicating with customers about it. Especially in a line of products that is titled "Pro".
5. It is also not a given that this affects ALL models of the 13". That is a huge stretch of a statement. How many unique posts are on this site discussing they have the issue? Let's say there is 200. 200 out of how many sold? There is no way to state this affects all 13" MBP's. There may be some machines that are perfectly fine.
6. This is happening to some older hardware. Well maybe. Evidence is anecdoctal at best and not wide spread. There is no confirmation from Apple on that. Just that the 13" model has this issue.
Summary. Wait if you can for a fix, do not use it for serious work until resolved, return it and wait or look someplace else.