This is misguided and wrong. The most important factor in good deforming meshes is the edge flow (edge loops). This determines how and where your pinching will occur.
a bit harsh doncha think? I'm not about to get into a pissing match with someone over this, but please use a little more tact in the future.
Edge loops, as you pointed out are important, but if your vertices are misplaced they are not going to fix the problem. With utra low-poly work, you often don't have the leisure of making nice loops, and triangles become more important than the quads you would normally work with in poly modelling. It's all interconnected, not exclusive to one or the other.