For the CTO

Greenfield development in general is very well suited to model driven methodology -
MDA will address the cross cutting concerns like

Security ( fine grained authorization and ACLS )
Internationalization
Design By Constraint
Web Services ( DBC for sanity checks, and Auth are auto applied before every method invocation)
Ajax 2.0 UI

Developers get the application created and just fill in the blanks as opposed to starting from scratch.
Also model drives the development throughout the life of the project and not just at the beginning.
Developers focus on solving business problems rather than integrating , plumbing etc.
Minimal errors since < 20% of the code is handwritten.

To give you some persective , we were able to deliver a 2 million project for under 250,000 .