Let's be reasonable. Samsung promised a firmware update by the end of September. at&t is releasing a firmware update throughout this week. Put two and two together. This IS the promised update guys. There will be no other this month or next month.
So, the mystery is this: Why is there no mention of the gps issue in the update notes?
Well, what are the possibilities?
1- This could be simply an oversight by at&t. Firmware updates aren't publicized by companies or followed by many people. You will never see an ad on TV saying, "Firmware abc123 is coming soon." So it's possible some at&t technician wrote a quick note and posted it and nobody checked it.
2- Remember Samsung didn't say they were going to fix a "gps problem". They said they were going to "optimize" their gps. They have been sugar-coating and/or ignoring the issue for the most part, while probably working on a fix silently. Did we expect them now to come out and say, "OK we have fixed our gps screw up now"?? They might be releasing the fix silently to make it go away and not have anyone talk about it.
3- Samsung, or some sources close to it, had said they were actually testing a firmware update. It IS possible the gps test results were negative, and they couldn't do anything about it, couldn't figure out how to fix it, and decided to release the promised September update anyway, with all the other updates and fixes (like lag problems, media scanning, etc). They're not going to come out and say, "We intended to fix the gps problem, but we couldn't figure it out." Instead they will just not mention it. They had a deadline to meet.