I also like the discussion on amount of evolution. I agree that species in stasis are still evolving to remain in stasis as that is the best adaptation at the time. You can think of it as a number of oscillations around a mean, each individual lineage may not be optimum but over time pssed from one side to the other and back.
Seconded. Quite a few replies and other following messages are also quite good. Further evidence that good messages tend to spawn good messages and bad messages tend to spawn bad messages.