I agree about the point you make about contrast and syntax hihglighting, but I disagree with your conclusion.

In my experience dark backgrounds with light text are more tiring on the eyes in long coding sessions. Text gets blurrier quicker than when using a lighter background. I came to this conclusion after years of using dark backgrounds, and having switched to light backgrounds.

Personally, I think the question should not be 'white background or black background', because IMO a light gray or blue background is even better. Borland was on to something with their C++ and Pascal IDE's ;-)