Believe it or not, sometimes Apple says things for a good reason.
F'rinstance: "FaceTime will only work over Wi-Fi." Now, on the surface, that just sounds like "Yeah, AT&T's 3G data network sucks, Part XXXLVII."
So Laptop Magazine decided to put that to the test. Using an HTC Evo 4G as a Wi-Fi hotspot, they connected an iPhone — and tricked it into thinking it had a broadband connection, rather than the Evo's 3G. A second iPhone went straight Wi-Fi as a control.
The results? The iPhone on the gimmicked 3G connection produced lousy audio AND video. (Check out the video above for the full test; it definitely does not have lousy video OR audio.)
Okay, Uncle Steve, we believe you. FaceTime plus Wi-Fi: GOOD. FaceTime Plus 3G: BAD.