[pdsouza]

I think we can all agree that we want to maximize the quality of our work, where quality is defined as how well our work satisfies our goal. Typically, the discussion is around speed vs. quality, but I think quality itself encompasses speed (time_to_market below):

quality = w_0 * time_to_market + w_1 * correctness + w_2 * performance + ...

The weights w_n vary across domains. As with most things, it's about finding the right balance.