I did a google search to learn more about Blender's cloth simulator. I was watching this tutorial https://www.youtube.com/watch?v=uW5PasvZPFg

Around 4min15 I see that Blender has presets for cloth types e.g. they set it to "cotton", so I wonder how they get around the issues that Gerald mentioned about not knowing the properties of the mesh in order to correctly set up the springs and forces...

edit: for anyone who is curious like me, this tutorial shows Blender being used in a Marvelous Designer way to stitch arms to the torso of the clothing... https://www.youtube.com/watch?v=q06lPp2PNG4