It just gives you more high back to press against with your boots and in turn a little more torque on your edge.
Put it this way: when you push back on your high back to get up on heel edge, you want to be pushing back perpendicular to the edge of your board, not perpendicular to your binding. The more extreme the angle of your bindings, the less of the high back you have to push against. Obviously, if you are pushing on one side of your high backs, then you'll get more flex than if you were pushing against the entire high back. That will make them feel flexier than they really are. Which may make your ride feel sloppier/sluggish.
If you have stiff high backs and/or are riding moderate angles, you probably won't notice much difference. Personally, I thought it felt better, but there are so many other variables that I couldn't say for sure.