Shioda did have a limited time with the Founder as a teacher. Here Shidoa can be considered similar to a student who theoretically the Founder withheld information. Shioda's skill didn't deteriorate, it improved greatly. Here we are looking at the benefits and development of a student who lacked much information and still developed great skill. Was he better or as good as the Founder? Good question, I don't know. It is evident he did improve with limited knowledge and instruction from the Founder. It answers the question for me, the Founder didn't with hold information.