Right, when dozens of manufacturers roll out hundreds of Android phone models, offering cheap versions and BOGO offers, including lots of Asian knockoffs, of course you are going to see them be the volume leader. It wasn't Android demand doing it, it was manufacturer push.
Who goes into a store demanding Android? The geeks do, of course. The open source principled types do it. Teen boys who watch the ads and think Android will turn them into a cool-looking robot. People who hate Apple. That's about it. All the other Android users are people who wanted a smart phone, got handed an Android phone by the salesperson, thought it looked good, and now they use Android. Occasionally it's a person who goes into Sprint or T-Mobile and asks for an iPhone, gets handed some high-end Samsung, and thinks, "cool, Angry Birds!"
So while the iPhone is the most popular model of phone in many countries, and while the iPhone has the mindshare thanks to ubiquitous commercial awareness, it is Android that has the sheer number of models and volume of phones sold. But it does not have the kind of momentum its users crow about, and certainly not for the reasons they think it does.