Domain-driven teams

I just watched Phil present on why enterprise architecture usually sucks, and it struck me that his talk resembled a formal argument:

1. Design always reflects team structure (Conway's law)
2. Design should reflect the business domain (Domain-driven design)

It seems to me that the following conclusion is inevitable:

3. Therefore, team structure should reflect the business domain

Logically, Phil's maxim that "what’s easy to change in the business model should be easy to change in your architecture" can only be achieved by structuring teams around domain concepts and avoiding cross-cutting concerns.