Dropped Calls in reviews

I've always had to wonder. Almost every review on mobile phones I've seen, tends to talk about how many calls were dropped, or how it's amazing that none were and similar tag lines.

But in all my years and across multiple mobile phone devices, across multiple carriers, countries and manufacturers I've never encountered a dropped call as far as I know, that wasn't caused by someone driving into a tunnel or subway.

Is just me who's lucky or is it only a problem in the US? I'm mentioning the US, since I assume that a lot of reviews are made by people from there.

I've really just wondered about it.