Deathclaws respawn.
"Duh, lots of enemies do Renee!"
no, I mean, they respawn, but they do not come from percentage-chance leveled lists as are often found in ES games. Meaning that there is no chance of them not showing up. Meaning that they are basically
hand-placed, and always come back after 3 days (I think it's 3 days in this game).
In other words, in the base game, raiders in (let's say) Super Duper Mart will not come back after we pwn them all. Deathies in Olney Power Plant will though. Because they are literally hand-placed with the respawn toggle on, every time.

And this means that when Cho Zen Wan went back into Olney recently, I was expecting there to be no deathies in the initial tunnels. But they were all there, dangit.
And I admit no shame in saying I changed this in my game. Turned the respawn toggle off, because such a large land animal could not possibly replace itself in such numbers (we're talking about nearly a dozen of them in those tunnels alone) here on Earth. In Elder Scrolls games, you can always blame magic. "Oh, they come back because of magic!"

Not so here in Fallout.
Man I'm so glad I'm doing Broken Steel on PC though. There's no way I would enjoy it on Xbox. Cho would not only have no followers with him, but he'd be forced to either fight all those deathies over and over, or he'd be relying on so much Stealth Boy it's not even funny.