I worked directly for Jason for about 3 years, as a direct report. I never once saw him bully anyone. He expects and pushes people to be their best. Additionally he doesn't allow people to waste his time, or the time of others in his organizations. Both of these are admirable qualities.
Additionally after I left his employ, he was our first investor in a new venture, and relentlessly supported us along the way. Jason is the best possible investor you can have on your side.