I test some large format film, but in this case it's missing the pictorial forest for putting the sensitometric trees under a microscope. I don't care if it comes in at 400 or 40 in shadow detail testing. What I care about is how the photos look, and I like the look of TMZ @3200 better than anything else I can shoot at 3200. (Delta 3200 is a close second.) They are both far better than Tri-X pushed to anything above 1250 or so. In fact they let me make photographs on film in light that I otherwise couldn't (without going to digital) and give a classic, grainy low light film look that I sometimes want. So I use them.
If I wanted to make prettier graphs I'd just stick to the TMY-2 I use in 4x5.