No steve, nice try on blurring the lines between iPhone 4 and the rest of the smartphones out on the market. I can understand cupping/deathgripping your smartphones will cause the bars to drop, but I can't think of another smartphone that will stop transmission to a halt by simply moving your finger over the 'weakspot' as shown in the videos below.
http://www.youtube.com/watch?v=tNmXrVNeGzs&playnext_from=TL&videos=NyBkeUX7zp4
http://www.youtube.com/watch?v=Wzn8QhrYIvI&playnext_from=TL&videos=akZbxrK-5i4
http://www.youtube.com/watch?v=tNmXrVNeGzs&playnext_from=TL&videos=NyBkeUX7zp4
http://www.youtube.com/watch?v=Wzn8QhrYIvI&playnext_from=TL&videos=akZbxrK-5i4