As bad as sand is, sugar sand has to be the worse. Not sure I've ever gotten a big street bike through a goodly patch of that stuff, no matter how fast I hit it.
I pretty much finally gave up trying after thoroughly embarassing myself practicing in a patch of it. Hit it again, the bike promptly went into the death wobbles, front end sunk right in and the bike and I flipped right over the handlebars. Wouldn't have been so bad, except there was a good ole boy on that road who watched it. Once he knew I was ok he was rather fascinated by my notion of learning to drive through the stuff on a bike like that.