This is probably not a good conversation to be having. I wouldn't want to see anyone riding that fast, really. And speed, just for speed's sake, should not be your goal. I take it you mean that you want to able to ride fast with control.
In my case, it was mid-week, the slopes were empty, snow conditions were perfect and there was very little risk. The run in question is straight, wide and consistent pitch. The worst thing that could've happened is I catch an edge and I would just slide to a stop on my butt.
I posted that speed up a few years ago in response to a thread about how fast we ride. I argued that we consistently ride at 30-40mph and a lot of people thought I was nuts. I stuck the GPS in my pocket to test my theory. I was right, 30-40 mph is cruising speed.