the consistancy is much more important than the number of stitches per inch- they tend to get smaller and smaller as you get better- even 5 stitches per inch is fine as long as the stitches all look even/balanced.
industrial sewing(done in factories on big noisy machines) and hand stitching are two very different animals, no one understands what you meant by the industrial part of your question...
unless you are wanting your hubby's quilting to look like it came from JC Penney's???