While your partner may be accurate in saying things like "no rush," I think a culture of GTD with speed and agility is important for success in young companies.

Among other reasons we often build companies to experience freedom. But are you really free if the very partner you're building with is stinting growth and progress?

There are a million co-founders and one of you; pull the plug if you're unhappy. Source: I've done this 3 times.