I work for a company (mobile games) that is really open about the tool used in production (according you don't ask for a solid work license to draw 4 cubes).
I'm more a tech artist there days, but I use Moi all the time when I need to quickly block out something, or for quick prototyping ... it's my best companion.

I have meet a good amount of concept artist, and from what I can see, for them it's all about speed ... I have seen many of them using sketchup, blender, zbrush.
They don't care that much about topology, normals, uvs, polycount ... and most of the time, after a little demo, they embrace MoI, for non organic work of course.

The fact Moi produce crisp poly model is also an advantage, at least you can provide some useful model later on. Even if "they" probably will be rebuild from scratch to fit in the pipeline, it's not a nasty triangulated mess to start with :)