There are a lot of great designers, and a whole lot less great developers. And to make matters worse, the typical startup seldom needs more than a couple of des

There are a lot of great designers, and a whole lot less great developers. And to make matters worse, the typical startup seldom needs more than a couple of designers vs needing a small army of developers - therefore increasing demand for good developers with a decent track record and decreasing job opportunities for the common graphic designer. Also, this graphic designers gravitate towards big design shops (since there is less opportunities as opposed to an "In House Designer") who then have a supernumerary selection choices for both, the top end very well paid designer and the photoshop grunt who spends his days pen tooling people out of photos for use in advertisement. Another point to take into consideration is that most designers on the rise end up managing art and/or marketing departments in which case they stop being graphic designers and end up with titles such as Creative Director, Brand Manager, etc... while a whole lot of developers on the rise keep being developers, albeit of the Senior Developer, X Specialty Dev/Architect/Programmer, et al. This last point will probably skew the charts a little bit unless you take into consideration the carrer paths of typical top end graphical designers.