The cited report and survey is not available at the link.
How convenient.
It’s a pew poll, and of course it doesn’t say exactly what the “Religion News Service” says. You can dig down from here:
http://www.religionnews.com/2013/04/30/poll-u-s-muslims-more-moderate-than-muslims-worldwide/
I’m a bit curious about this “news service”. Another muslim front?