If someone talks fast, I tend to talk fast with them.
Same thing for slow talkers.
When I was growing up, I always said “thang” instead of “thing.” It’s because some of my mother’s folks were from Tennesee, Kentucky, North and South Carolina. I can now “fit in” wherever necessary! WisCANsin and Minnesota are a little hard for me to do these days, but I can, if I think about it.
(I still say “thang” if I’m not feeling well.)