Good for you. Now the theory of the defect in I4 has been explained. The resulting dropped calls have been experienced in practice. Finally, the phenomena has been verified in laboratory environment.
It proven. There's just no rational way to deny it. If you choose to go beyond rational arguments, well that's your choice, but I'm out of that discussion.
And the problem is unique to I4. No other cell phone has been shown deteriorating antenna performance at all using one single finger.
I have 2 friends who currently have the iPhone 4 (unlocked) and both have tried to drop a call AND NOTHING!!!! maybe people should be looking at the poor 3G infrastructure the US has!
Granted I live a few meters from Movistar's headquarters and being in the center helps with signal strength, but still cannot reproduce the effect you and others are talking about!