As a stormwater engineer, I can't agree with TU on this one, at least as their stance is presented in the article. They are going from no treatment, to some treatment. Even if it is not as good as it could be, it is an improvement over existing conditions. There is still a whole watershed that needs work.
However, nymph-wristed brings up a good point. Many developers/owners only care about meeting the ordinance requirements to get the plans approved, with no consideration of how they will actually function in practice. There is a big difference between designing to meet regulations, and designing to actually solve the problem. Usually the final design is a compromise between the two, because the engineer will always want to solve the problem (HOPEFULLY), and the owner wants to spend the least amount of time and money possible.
If these plans are public anywhere I'd actually find them very interesting to look at.