I think it also depends on the goals. I think Greg or Robb has said that for mass gain, a PWO drink may be needed. However, for my goals of general athleticism, health, and low BF%, I've had much more success with no PWO drink and a Paleo meal about an hour later (give or take depending on hunger level). I noticed a nice decrease in abdominal fat once I dropped the PWO shake, which was made with low-carb protein powder, fruit, yogurt, coconut oil and walnuts (I know...no fat in PWO shakes).
Edit: I think Greg nailed it in the "PWO Nutrition" thread. PWO nutrition is about performance, not health. Elevated insulin is probably not a good thing in any aspect.