As weird as it sounds, I compared the screen of the Galaxy S III to that of my 4S in a browser window (same web page) and I could actually read the type on my 4S easier. The Galaxy's screen, though larger, seemed more "yellow" to me and the fonts, though readable, didn't have the same crispness of those on my 4S.
I hope so. I remember the iPhone 4 preorder. I stopped trying to get through to Apple's site at around 9 am. I went to a movie (I think it was The A-Team) and returned around 4 pm. I got the new iPhone ordered about an hour later, but it got delivered on time.