As you can see from the demo video, the signal was a full strength and he was holding two iPhones, one in each hand, therefore was not even touching the weak spot, let a lone being on WiFi.
So just demo speaking. Since there were 570 computers running WiFi in ad-hock mode or AP mode. (probably jail broken iPhones, with tethering) I can believe his troubles were due to signal interference.
I have been at WWDC 3 times. It's a pain to get clean WiFi when everyone is trying to get on. (5000+ people) Even 3G becomes useless with those numbers.
So just demo speaking. Since there were 570 computers running WiFi in ad-hock mode or AP mode. (probably jail broken iPhones, with tethering) I can believe his troubles were due to signal interference.
I have been at WWDC 3 times. It's a pain to get clean WiFi when everyone is trying to get on. (5000+ people) Even 3G becomes useless with those numbers.