What's in a name? Snowolf didn't like ruddering, but he admitted there's a place for slash braking. In the broad strokes, they work like this:
Ruddering: Put your weight forward on your board, and swing the back out.
Slash braking: Put your weight forward on your board, and swing the back out.
I expect to get some flack for that, but the point is that the differences are subtle, and have more to do with your upper body than your lower body.
I use what snowolf called slash braking and what I called 'windshield wiping" when going down a narrow trail and I need to keep the speed down. Essentially the front of the board stays more or les in the center of the trail and the tail is swinging back and forth from side to side. The difference between this and what I used to do when I was a beginner (ruddering) is that I can slash/wipe/whatever without having to swing my arms in the other direction. So I think that whether or not you're using good technique is based on whether you're doing the twist or just shifting your weight.
I'm sorry. Was I talking while you were interrupting?