I received my iPhone 4 today & there has been no problems.. I wrapped my hands around the antenna & didn't lose one bar. I wrapped both my hands on each side & no bar was lost. I also did the same to my girls & nothing.. I have had GREAT service all day, and no drop calls.. Internet has been real fast, so I have nothing but positive things bout this phone. No yellow stains for me either...
Finally, something sensible. I am starting to believe of mass trolling especially from Gizmodo and Co. Antenna mess is so ridiculous, it makes me laugh - you do not even need a degree to know how a human body can become a drainer of a signal, so I am sure Apple engineers were aware of this. But remember those 3 slots everyone were confused about - they actually prevent antennas to become full circuit. It is just funny to see people ready to squeeze the hell out of iPhone to demonstrate how few bars drop. One video was just super:"...as we can see the bars are dropping, I hope". The OP HOPES the bars will drop. I think this is nuts. I have seen a guy in Apple store today, he was holding new iPhone, had 3G while I had Edge on my 3GS, he had no yellow spots and full signal! However, all these posts should make one aware of the possibility - I will check my out when picking it up tomorrow.