I manually checked for the update and got it. GPS is definitely improved, but I suspect some will still not be satisfied. It definitely locks faster and better-- previously I never got good locks, even with the supl workarounds etc. Now it's locking within about 30s and is giving me claimed 10m accuracy in maps, even indoors, whereas before maps pretty much always had a giant blue circle around the location, and in fact, my actual location was usually not even within the circle.
So I took it out for a quick walk running MyTracks. Previously, I didn't really have the patience to wait for it to lock, it took so long. Now it locks, but the track was kind of a mess. It was in the ballpark, but it had me off to one side of the path I was on, then it jumped to the other side, then it took a right turn (without me) and went into someone's house. To be fair, I am in a very heavily wooded area, and I also have a Garmin Forerunner 201 which I use for jogging, and although it's better, it's not wildly better. I think this is just a challenging GPS environment because of the trees. I'll have to try it out on the road when I get a chance where the tree cover is less and see how it does.
But the behavior is enough different from before that I have to conclude that this update does indeed contain what Samsung considers to be the fix. And that's consistent with the announcements they've been making on twitter, etc. Whether it's actually good enough to make everyone happy, time will tell.