Not sure, but I believe that part of XP is having devs do more/all of their own testing and getting rid of the developer vs. tester roles (note that this doesn't necessarily mean getting rid of QA), and this aspect of XP is increasingly common.
I probably would be disinclined to hire a developer who wanted a different person to write/run their tests, unless it was for a very specialized role and said developer had exceptional talents.
> to hire a developer who wanted a different person to write/run their tests
That's not the role of the tester. The developer should be writing and running their own unit tests. The Tester should be running through user scenarios, use cases, and basically be pretending to be a user of the software to make sure that everything works and makes sense in a workflow (not just in their unit components)
So, it sounds like the only real change is that we don't call QA people "testers" anymore and have a fancier name for them? Kind of like it's gauche to call yourself a programmer nowadays and we're software development engineers instead?
I probably would be disinclined to hire a developer who wanted a different person to write/run their tests, unless it was for a very specialized role and said developer had exceptional talents.