Don't get me wrong your DD is most likely a strong catcher and the number is probably a fair representation of her skills. My problem with pop times is that I have seen some players claiming 1.6-1.7 pop times that could not throw out granny in a wheel chair.
I tell my Players to never, ever offer a pop time, pitch speed, or HS batting average to a college coach unless you are asked. Find another, more effective way to make you case. If you are asked give a range and do not dwell on it.
That was someone else saying 1.9. My DD hasn't been clocked quite that fast. She is, however, pretty accurate at throwing and can and has thrown down runners at all bases (even on third even though she's a lefty). I don't claim she's all that and a bag of chips, but she's getting the work done pretty well and doing her share (ball is not always caught by the infielder).