Sigh.

As the saying goes: You can lead a horse to water, but you cannot make it drink.  ;-P

And to be honest, stating the obvious over and over again gets old fast.

1. The 8:1 head ratio is the most universally accepted, that´s why I choose Loomis charts. 7:1 or 7 1/2 :1 is more "average" but
   obviously people are already scared by his "ideal" 8:1 ratio.
    

2. The various head to body ratios are a fact regardless of body type. Any Doctor can tell you that there are limits for head size.

3. The average height of an caucasian US or European woman is around 5' 5".  People way above or below that or not the average.

4. You can render anything you like. But when you make a street scene where all people are beyond 6' 0", don´t claim it to be "real" or "normal".

5. Even if advertisers want to make you believe otherwise, tall people are not "better" than average sized people.
   So don´t buy stuff just because it was advertised by a giantess.

6. Take Vicky as what she is: A pure fantasy.
   Enjoy playing with her.
   But again, all the lightning and shading tricks in the world won´t make her "real" unless you at least scale her friggin´ head up.

7. I´m all for art. But the modelling process is pure mechanic.
   Art has no place in it, not as long as you want to create a realistic 3d representation of a real world item, and that includes the human body.
   The art part happens when you bring the mesh to live with expressions and build a scene to tell a story.
   Before that, it´s all craft.

And finally, let me show you Mrs and Mr Average:

Thanks for looking and I hope some found this thread helpfull.

Stahlratte