I generally agree with this statement, but extreme saddle-to-bar drop, such as you might see on a bike setup for racing, can muck with the weight distribution on the bike, when you are in the drops. Suddenly, the front wheel, which was more than happy to skate along, is loaded with more weight, and it digs in.

It begs the question why someone would setup a bike intended for use on loose surfaces with the handlebars so low, but nonetheless...