I tried it and still think it's unnatural BECAUSE it takes 3 hours a day every day to get them to pitter around. Horses are being bred for WP now so it is a more natural way of movement for them, but for my speed/cow bred horse, it took a lot of work to get him to move like anything similar to a western pleasure horse. I'd love to try one of these speed pleasure classes!
I showed for 20 years in WP, WE, and Trail, so I have tried it. And, it IS unnatural for a horse to carry it's head lower than it's poll unless it's eating! If it's so "natural" why are you spending 3 hours EVERY day getting your horse to move like that?
Go watch a horse run in a field - the head carriage is natural, and how WP USED to be - natural, fun and a real PLEASURE!.
PS - Since 1984, more WP horses have developed arthritis in their shoulders because of unnatural head carriage.