The "Get it by" dates that appear in the shopping cart are not reflecting the delivery timelines in the Shipping Profile.
For example, regular First-Class postage should add 1-5 business days after the processing time, and Priority Express should add 1-2 days. A customer told me, after adding one of my items to their cart, it appears that shipping via Priority Express will take longer to receive than First-Class.
This happening in other shops, not just mine. I use "Fixed" rate shipping, I am not sure if it is happening with "Calculated" shipping as well. I contacted Etsy and they reviewed my shipping profiles and agreed that the "Get it by" dates are not accurate. They are looking into it, but I wanted others to be aware.
@LilyReed - I see the same thing in your shop. Priority Express is going to take longer than the other 2 options.