If you decide to keep all same content for mobile and desktop, why start with mobile first? Also, I see responsive as a progressive enhancement, so those browsers that don’t understand media queries, don’t get responsive. Besides, why make IE6, IE7, IE8 responsive on the desktop? Give them the default desktop view. I don’t get responsiveness on the desktop…find layout changes due to browser window size disorienting if anything. By the way, fantastic job on the Greenbelt website!