Ok, so we know the theory behind a good intake manifold. Does this mean if this theory is applied then the results will be good?

For example we know (this may not be 100% accurate by it is for arguments sake):
1. Plenum should be around 1.5X the engine capacity
2. Runners should be 10% larger than the valves
3. No sharp edges, no sharp turns
4. Design in such a way that all cylinders get equal flow
5. 25cm runner length for 8,000rpm peak torque
6. Ram tubes aid in power

Now lets say all the above are 100% accurate, and lets say we implemented 5 other points that would be an intake manifold a good design. If these were following is it likely to be a better design than the OEM manifold?