Well, problem solved...everyone with iPhone 4 can get a free case! Interestingly enough, Steve Jobs showed that by holding a HTC Droid Eris the same way, you also see 4 bars going down to 0 bar.
I can hold my phone anyway I want to and never drop bars. Plus, I get better Verizon signal than my colleagues AT&T iPhone 3GS in the same office.
Apple to give away free cases to iPhone 4 users -- Engadget
Live from Apple's iPhone 4 press conference -- Engadget