Isn't it true that:
1) The most common issue with posterior tilt is flattening of the lumbar curve, and flattening of the lumbar curve leads to an increased propensity to move into lumbar flexion. As we should all know by now, our lumbar spine really doesn't like lumbar flexion, especially under load! Lifters in posterior pelvic tilt are going to be more predisposed to disc herniations than those in anterior pelvic tilt.
These points appear to be problematic until you actually try it. These are not weight room recommendations as it appears the article you cited are discussing. The heavily loaded, less dynamic, quasi-isometric postures observed in the lumbo-pelvic-hip complex in weight room exercises are not comparable to a high speed dynamic movement like sprinting where much of the activity is unloaded, the speed of movement is much greater, and the movements are unilateral and cyclic in nature.
I'm not recommending anything more than about 5-10 degree change in tilt. I have published research on this very topic and the pelvis still oscillates as it would with a 'normal' posture, it just shifts the center point of that range of motion to a more upward tilt. I've never seen anyone who can position themselves in to a position of lumbar flexion while sprinting…not even Gatlin or Dix who used what I would consider extreme posterior pelvic tilt..
2) Flattening of the lumbar spine typically leads to an increased kyphosis (or slouched upper back) and head forward posture. Excessive kyphosis isn't a good thing if you value your rotator cuff health, and head forward posture puts you at increased risk for neck pain as well as cervical disc herniations. Yikes!
You're talking about extremes….I'm speaking of a minor shift. Completely different things. Gatlin and Dix (the two most extreme posterior pelvic tilters) do run with slight kyphosis and I'm not recommending this. In fact, my training is geared to making the slight shift in pelvic attitude that I'm speaking of a tonic, non-volitional position achieved through appropriate tonus of the muscles surrounding the pelvis.