Huh ? No. People in China are not facing just DNS blocking. There's DPI going on there (not for everyone), and they're nating a lot of people. And, in US, what if using some other thing than your ISP DNS server gets forbidden ?

Anyway, most of the people in America and in the world do not have a single clue about changing dnsservers... Heck, most of the times they do not even imagine that a website domain relates to an IP address.