Graphic designers, yes. But music and 3D is mostly Windows in my experience. Because how are you gonna fit a high end graphics card or audio interface into your mac? (and don't tell me about firewire please)
I'm in and out of recording studios all the time. I haven't seen anyone running a Windows rig in probably 8 years. Everyone I know is running Pro Tools or Ableton on a Mac. And even back when I saw people using Windows in that role, they used external audio interfaces, just like they do now. Except with Thunderbolt, you get the expandability with effectively no latency.
I love Windows, but the recording industry lives on Macs.
