I am not an electrical engineer, nor do I have any expertise in the design and behavior of antennas. By internet standards, then, I am perfectly suited to weigh in on the left-hand-iPhone 4-reception issue. And I have just two comments.

First, every phone I’ve ever owned—whether from Nokia, Motorola, Sony Ericsson, or Apple—has had its signal strength bars fluctuate when I’ve:

I’m sure there’s a pattern here.

Second, every radio and rabbit-eared TV I’ve ever used has seen its reception improve when someone is holding the antenna. I stood through countless innings of White Sox baseball in the 70s, holding the antenna just so to reduce the snow on Channel 44.

Update 6/25/10
Via @mackenab and Daring Fireball, some guy who doesn’t understand how the internet is supposed to work posts an article in his actual area of expertise, ruining things for everyone else.