The testing is interesting but people seem to be reaching wildly different conclusions from it being not a problem to it making a lousy phone. One guy on Engadget commented that out of all the phones between him and co-workers, the iPhone 4 was the only one that could make a call 20ft underground. Others are reporting much fewer dropped calls than previous iPhones.
Then there are those reporting the exact opposite. I guess this is the magic that Johnny Ive keeps going on about - it exceeds your ability to understand how it works and when it doesn't, they don't know how to fix it.
It didn't even seem to hold up too well inside the case when held wrongly.
The problem is that there's nothing other than anecdotal evidence. Anand at least made an attempt to measure things in a semi-controlled environment. and to implement controls. Gaywood did neither.
Note also, that Anand's conclusions were that the iPhone 4, even with its minor glitches was a considerably better phone than the iPhone 3GS - or any other phone on the market. And that was after a wide range of comparisons, not just Gaywood's one uncontrolled experiment.
How do you know there's no response? Are you managing Apple's R&D labs? Based on history, they're not going to say much until they have a fix.