Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Interesting part:

"The stainless steel band that surrounds the iPhone 4 and serves as its antenna, Klug writes, is better than other cell phones', even with all the attenuation."
 
I must be missing something, all I get from this article is what we already know, except they're just using numbers instead of bars.

This attenuation varies of course, and often leads to dropped calls. So in that sense, it nulls out the fact that then antenna is better.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.