when testing, make sure you try poses that are sort of mid-way extreme as well as extremes.  V4, for instance, doesn't do so well with partially bent calves.  i've had times of needing to bring her calf to her thigh or have a nasty and inexplicable dent.  it might be a JCM issue, but still...  and extreme poses are outliers, but the most important poses are common ones.  i'd say look at 30's to 70's pinup photographs, and you've got the most accurate reference for a good 75 to 80% of Poser/D|S usage.