The one guy from Scotland seems to have an issue showing his iPhone on you tube attached to the first link, but I am not sure if it's an Apple problem. I would tend to think it's more related to the carrier.
When I tried the iPhone for the first time at the Apple store today, it cruised the internet pretty well no matter how I held it. Here's why I think it's the carrier and not Apple (and
before someone calls me a fanboy, I am guilty of being a fanboy but a real fanboy holds Apple up to high standards, too). I would argue us fanboys are more critical of Apple when something isn't great.
I was in a town with very few hills (where the Apple store is), or section of, and very few trees. My regular AT&T-run Motorola Razr works fine there, too. Now when I go back to my hilly, wooded town next door, then my phone, and other AT&T networked phones just don't do very well.
I really think in some areas in Northern California, AT&T is just terrible. People had issues with other iPhone models in the more rural areas. Of course, the issues are dramatically reduced with Verizon jailbroken iPhones or any Verizon phone, but this is just my area. Some people in other areas of the USA seem to have better reception with AT&T, so I think this could be mostly a carrier issue.
This doesn't rule out the possibility that Apple has a bad design flaw that adds to the already bad AT&T issue and then that would mean Apple needs a small fix.
AT&T, they are far beyond a small fix in my parts.
I am no fan of lawsuits, especially frivolous ones, but Apple needs to at least address the people who are really having issues with iPhone 4. Now if everybody who bought an iPhone 4 had an issue with the reception being bad with holding or touching the lower part of the iPhone, then there could be merit to the current class action suit against Apple.
At worst, I see this as maybe just a less than perfect Apple design, but not a complete failure of a product. Toyota had some issues with some of their cars and then fixed them, but that doesn't mean everything the company does, or ever did, is bad. It's not a black and white thing.