Are treadmill inclines usually by half percents ?

not sure how the incline works across treadmills…I had 1-20 “presses” on my old treadmill when I assumed it was incline by degrees. Then when I started to have to use my gym’s treadmill I noticed each press gave me a half percent. I like that it goes up by halves. Can I assume that on most treadmills, it should go up by half percents?

I am ready to buy a new treadmill. The incline is invaluable to me!

looking at the Horizon 7.0/7.4, or Horizon T102 or Sole F63. Gonna go test them out today, but I wanted to know what I was getting into assuming customer service at the Dick’s is gonna be pretty bad