That was fast! Apple has not only posted up the video of their iPhone 4 Antenna Press conference from earlier today (sadly, without the Q&A), they have also put up a dedicated page to discussion signal strength issues with the death grip:

On a mobile phone, signal loss typically occurs when your hand attenuates the most sensitive part of the antenna. In the photos and videos below, we demonstrate how different grips cause attenuation on many popular smartphones — including iPhone 4 and iPhone 3GS.

Say what you will about Apple PR, but when they decide to make a move, they move fast and make as big a splash as they can. Give it a watch and let us know: are you convinced?

Video after the break.

Antenna page; via Engadget