Maybe I'm understanding this incorrectly:

"Increasing the length of the fork, for example by switching from rigid to suspension, raises the front of a bicycle and thus decreases its head angle. A rule of thumb is a 10 mm change in fork length gives a half degree change in the steering axis angle."

So If my head angle is 72.5 degrees with a 375mm fork, wouldn't it then effectively be 72 degrees with a 385mm fork? Or is that backwards?