Brilliant, thanks!

  Greeting: <AmE> Hi, how are you guys doing?
  Greeting: <AmE,infml.> Hello, how you guys doing

  Response: great

  Greeting: <BrE,arch.> How do you do?
  Response: <BrE,arch.> How do you do?

  Greeting: <BrE,infml.> Hiya
  Response: <BrE,infml.> Hiya
  Response: <BrE,infml.> Not too bad - you?