I have the UAG "ice" colored case
Got into an argument a few weeks ago and threw my phone onto the floor at an angle, like a diagonal arc going down. Picked it back up after 5 mins and not a dent.
Also often drop the phone on my kitchen floor that's tiled, no issues here as well.
I think it's because the case has some rubber stoppers protruding from the inside. I've only seen it on the maverick and not the colored cases but it raises the back up a little and doesn't ever really touch the back of the phone (which is a good thing) so it almost cushions any impact onto the back.
I use it with a tempered glass protector and I'm very satisfied with the drop-protection of the phone overall with the case + glass on it.