As I'm just starting out I've been using some tutorials in maya, one had me start from the foot, mirror the object, and build the body (of a woman) up from there. Another had me start from the mid section (chest to be specific).
I was wondering if one method is more correct than the other or if it's a preference.

It doesn't really matter as long as you have good references.
You can start from detailing an element then grow your model from there.

I believe your tutorials are using edge extrusion techniques?

some are edge and some are face extrusions

There is another method where you start with a box, move its vertices so that it is of the size and form of your object, then add some edge loops and create the rough shape of the object then add more edge loops and make the form more defined and so on.
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Andyba, 3d artist
skills: 3d modeling, texturing, rendering, 3d character animation, compositing
3d software experience: 3ds max, Maya, Softimage XSI, Deep Paint 3d, Body Paint 3D, Wings 3D, Z Brush
2d software experience: Adobe Photoshop, Adobe After effects, Macromedia Flash, Freehand

I always use edge extrusion but that's just because I find it easier to control, normally I would start at the feet.
This is only possible if you use reference, drawing or photograph, atleast in my case.

i also want to know the answer.