Since I have been at SXSW I have only seen three huge lines: this make-shift Apple Store, the Frog Design opening party and a session I failed to get into today.
I have seen just as many original iPads in use as I have iPad 2s being used. I have also seen a deluge of Macs and very few Windows PCs.
I have yet to see any Android tablets. I did see one Google phone as the user was smacking the side of the phone to try and get the screen to rotate.
Apple has zero advertising that I have seen, yet has the overwhelming presence. Amazing.