Some folks were wont to run naked with the horses at night. They sought a divine ecstasy though synthesis with their totem animal. Some interesting and pleasant things occurred in the week following that impromptu sumbel. In this way, Ehwaz ties into Laguz, the water-rune. I think they are onto something here, seeing horses as symbolizing the subconscious.
Horses are as dumb as rocks for the most part, but have plenty of emotions.
Thoroughbreds, our Kentucky specialty, are particularly neurotic. Ehwaz, the horse-rune, takes us on our spiritual journey of inner transformation. Just as Odin rides Sleipnir, this rune can lead us into the inner realms of our being. These set the stage for Ehwaz. Elhaz imparts the will toward transformation.