First, who cares about what consumer reports says, I've never heard about them before people started saying that they "don't recommend the iPhone 4". They're just a website like any other!
Second, apparently, the iPhone 4's antenna problem isn't very serious, as people have stopped talking about it until now. Maybe lab equipment can show a difference between the iPhone 4 and other phones, but in every day life, it doesn't seem that it's a big issue. Otherwise we would hear people complaining way more.
Third, I don't think a mobile phone in the 21st century should ever drop a call, with the only obvious exceptions being when you're in a tunnel, or the basement or something similar. But you don't really use your phone in those places anyway, so it doesn't really matter. I've owned 5 different kinds of non-smart phones, an Alcatel something, a Siemens C55, and 3 Nokias, and I have never had a dropped call in my entire life, not even once, while talking on the phone. So I guess that if 10 year-old technology can deal with reception then 2011 tech should have no problems with it ever. So far I have not used an iPhone, but I have not heard anyone I know who owns one complain either.