There are 21 TETH abnormalities in the game, meaning that they make up 24.7% of all abnormalities. This means they are the second most numerous class, beaten only by WAW abnormalities (25/85, aka 29.4%)
Not including tools, the average maximum energy is 13, and collectively they can produce a maximum of 208 energy
The most common damage type of TETH weapons are red and white (6/15, 40% each), and the least common is pale (1/15, 6.25%)
Out of the 15 EGO gifts TETH abnormalities have, the most common slot it occupies is "Head 1" (5/15, 33.3%)
I have LOADS more, and would be glad to share them here, but only if it doesn't cause a problem. Maybe they're uninteresting? Idk, you decide. If I get at least one comment advising me to do it, I will!