I would say your demographic is too small or fits into a banded age group. Most likely what they listen to will be influenced by the music they liked while growing up, or what they have found puts them into a comfortable zone. I know what I listen to changes based on my mood and the task at hand.
I know lots of programmers who listen to classical while they work. I personally listen to female singers while I work, although if I need to really get motivated I put on some metal or dubstep because the fast pace helps me. It's all personal preference.
Most DOPE programmers I know listen to dubstep, techno electronica ect. None that I have met listen to metal. To be blunt with it that is an irrelevant correlation.
One of my programmer/EE coworkers turned me on to the band Dope, now I alternate between that and K-Pop, next month it might be something else.