"Obviously I'm thrilled, not only that Edgar's riding him, but that, in doing so, he's endorsing the horse," Motion said.
http://www.drf.com/news/article/93732.html
So, apparently Motion looks at Prado's choice as an endorsement of the horse. Or is this just trainer-speak? One thing that bothers me greatly about Adriano is Motion's concerns that the horse won't handle the crowd at the Derby.