Often I find myself searching for quotes or statistics to back up what I say to clients and co-workers, so in an attempt to keep everything in one place this - post exists.
"The problem with quick and dirty, is that the dirty remains long after the quick has been forgotten" - Steve C McConnell
"If your worrying about device width, you don't understand responsive web design" - unknown
"Strip your website down to the basics and do a few things really well" ― B C Designers
"The quality will remain long after the price is forgotten" - Sir Henry Royce
"Don't just fix the mistakes - fix whatever permitted the mistake in the first place" - One of NASA rules for better software
"Google recommends webmasters follow the industry best practice of using responsive web design, namely serving the same HTML for all devices and using only CSS media queries to decide the rendering on each device." - Google
"Web design is responsive design. Responsive web design is web design, done right." - Andy Clarke