This is a step forward (possibly the first of 12)
Apple basically stated that this hubub is based on a misperception caused by their faulty formula for calculating+exaggerating the signal strength bars, and rather pointedly directed its apology towards "any anxiety we may have caused."
Apple has also resolutely maintained that the wireless performance on the iPhone 4 is the best ever, and has never acknowledged that there is any flaw in the hardware.
So now, Apple will solve what *it* perceives to be the root of the problem, and people will then observe 1-2 bar drops instead of 4-5 bar drop when they hold the phone "in a certain way," as Apple puts it.
Ultimately, this comes down to dropped calls, and those are measurable. If Apple is in denial about the nature of the problem, this patch throws out their Valium supply.