Responsive web design allows the notion of “one web” to be a reality. Designers are increasingly able to sell to their organization the idea of delivering content to multiple platforms. Putting it into practice is another story.
Jason Grigsby, co-founder of Cloud Four, says that it is easier to sell the idea of responsive web design than to do it well. Simply shifting the layout of your design to fit different screen widths is only half of the battle. Page weight is another consideration.
A huge part of mobile experience is performance. Though connectivity speeds are increasing on mobile, shrinking your desktop site to fit on a mobile screen isn’t the best option. Jason says that this is an often overlooked aspect of responsive design. Most of the concern is around how a site renders on various devices, but the importance should fall on the entire experience.
http://www.uie.com/brainsparks/2013/01/04/jason-grigsby-when-responsive-design-meets-the-real-world/