webcentric - 5:14 pm on Aug 9, 2013 (gmt 0)
I'm not a guru on the subject of mobile design by any means and I wasn't thinking of a device automatically sizing a static page to fit the screen but I've definitely seen that behavior with our old site design and I've also seen devices open the page at full size with only a part of the page visible forcing the user to zoom. Either the scale of the ad is out of whack with the available viewing space or it's so small as to be almost unreadable. You get such better use of space with a responsive design and should be able to completely eliminate the need for zooming or horizontal scrolling.
Bottom line for us was, we couldn't ignore the mobile traffic any longer and the rewards we're well worth the late nights of coding it took to get 'er done.
Not sure what you're using for a CMS but if you've got hand-coded sites like we do, something like Grid960 or Twitter Bootstrap can really speed up the conversion process.