Who knows, it could have been abbreviated for... Computer Science
Either way I'd say it's a safe bet for someone with a degree in computer science to use better standards and command a better programming knowledge than a random PHP developer with no degree...
I say a safe bet because it's odds I would bet on. That's not the end all be all though as I know a LOT of guys without degrees that know far more than those with degrees...
The real testament is whether a developer pursues knowledge outside of what is required of him in his position. The experienced developers who never stop reading, learning, and experimenting with new languages and development patterns are the ones who should command six figure salaries; regardless of primary language. They are the ones that bring new ideas, the cleanest code, and the highest drive for success to the table
I tend to categorize developers who just "perform" at work as "producers" and there is certainly a place for them. I know a couple of really good PHP devs that simply aren't motivated to extend their knowledge outside of what is presented to them at work and while I wouldn't pay those guys a six figure salary I WOULD hire them as they tend to be "project finishers" more than "project starters". They most likely won't bring innovative solutions to the table for challenging problems but they can weigh in, and they will be the ones most likely to implement the solution derived by the heavy hitters.