Because I lived two and a half hours away from the hospital where the motility studies were to be done, the staff was good enough to schedule the tests over the course of two days. Like you, I wanted to speed the process as quickly as possible.
I can't imagine a gastric motility center telling you to go home and drink more water/take more fiber like gastro doctors do.
By the time I saw the motility specialist, I was so desperate for help that I let him know how miserable my life had become. I think that got his attention.