Because if the majority of users were having the kinds of problems reported here I can guarantee you the reports on these forums and others would be much, much worse.
I have used my iPhone outside Lisbon and all over Portugal, loading GPS maps whilst driving on the motorway, on the beach, all over the place and have never had a problem, and I get good 3G coverage pretty much everywhere.
"It doesn't matter what you know about GSM/Edge/3G, if you're getting a lot of dropped calls you will know you have issues!"
*If your local Apple Store or service provider either turns off 3G or directs you to do so, you will NOT know you have issues. If a customer does not know the difference in GSM-EDGE-3G, then those customers will remain unaware of their poor (now turned off) 3G service.*
"Even so, the vast majority of iPhone 3G users have no issues at all."
*What evidence do you have to support that assertion. I know 12 iPhone 3G users and I am on my 4th swapped iPhone. We all have the defective 3G issue. So, I would be very anxious to know what your empirical evidence is (and an email supposedly from Steve Jobs or a PR statement from a provider claiming 2% have problems IS NOT empirical evidence).*
michaelab, We all appreciate your +empirical evidence+, "Because if the majority of users were having the kinds of problems reported here I can guarantee you the reports on these forums and others would be much, much worse."
As an aside, perhaps you should do some research and discover a more widely understood definition of "empirical evidence."