("Us" in this case being Americans, not the Chinese.)
If I ask an American to do something:
Me: Can you fix this memory leak?
Finn: Yeah.
Me: I'll assign the bug to you then.
Finn: Okay.
That was all right, nothing to write home about. Now witness this same exchange with a Brit! Suddenly it's so much more interesting!
Me: Can you fix this memory leak?
Alipé: Could do.
Me: I'll assign the bug to you then.
Alipé: Brilliant.