Well, this is the oldest, most-established Android users-helping-users forum there is, and this is the largest selling model with something like 10 million sold so far.
Naturally, with any new device, there are always growing pains and issues, some hard, some not so hard, some real, some just misunderstandings of how certain features work.
Put that with the new top seller and there would be something wrong if you didn't see lots of support threads.
In almost 100% of the threads with problems, you'll find users without those problems helping others.
Myself, I chose the One X - same deal - problems, a few for me too, my posts in the forum for that.
I think you'll find there's a good reason that the SGS3 is a top seller - it's a top performer.
That said, as you know, Android is all about choice, so if the SGS3 isn't your cup of tea, there are others to consider as well.
Hope this helps.
PS - let's keep this exactly on point for the OP's concerns, ok, cheers, thanks.