If the store doesn't use Pay, then I just use my debit card - swipe and enter the PIN.
I have no reason to disbelieve you with chip and PIN, but in my own experience (actually that of being in line behind someone trying to use it), it seems to take quite a while... and TBH, at least once it was user error - the lady kept pulling her card out of the terminal before it notified her to remove her card.
We had these kind of problems in Europe when Chip cards were introduced 20 or so years ago. Once the customers get used to them they are actually quicker than swipe cards. This is all moot though as I'm pretty sure the US will mostly bypass them and move onto various forms of NFC payment. It will be much like cell phones where the US was way behind in the early days of adoption but soon raced ahead once caught up.