I can assure you there was. I could drop calls without even trying just by holding the phone in my hand normally. No death grip, just the base of my thumb along the side of the phone, bridging the antenna gap. I did not have the same problem when using the phone in a case, which clearly tells me that this was not my hand shielding the signal.
What is it with people who cannot admit Apple have produced flawed products?
I owned an iPhone 4, used it for one year, without any problem.
Antenna gate was another web based invention ...