I work almost exclusively with Lo Poly but try to keep them +/- square even when morphing to the extreme.

Look at the thread here about Dark skin.
See how Lo Poly they are? Not a single false shadow.

Show a wireframe and we might give more idea's.

I do not think it is the Low poly, but more the Long Poly's.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!