The market data suggest that you're mistaken. In 2010, the App Store took in almost 20 times the revenue that the Android Market took in. $1.7 billion for the App Store, compared to $102 million for Android Market. Considering where Android market share stands relative to iOS, this means that iOS users are absolutely more willing to spend money on apps. That's obviously not the case for every Android user, but the relative aggregate difference is what matters when deciding what platforms to develop for.
As an iOS developer, I can't stress how important this metric is. I don't care if Android gets 70%, 80%, 95% marketshare if the App Store is generating way, WAY more money for developers.