Also when it comes to learning wind speed, there are the two biggest limits:
The low limits are based on your skill. When yours is slow or won't launch, that is YOUR lower limit on the kite, even when someone is flying with skill next to you.
The upper limit is learned by replacing a spar or patching a sail, or seeing stretch marks on the sail. Your limits may be different than someone else, especially if you hang out on the power zone or the edge of the window.
With 3-wrap I estimate a STD up to about 10, a MV up to about 15 or 20, a FV up to about 20 or 25. With race rods a little lower, with 4-wrap a higher max until you start stretching the fabric. But it all varies by pilot.
The factory numbers are a decent guide, but the human on the handle is a big factor. If you have enough wind to fill the sail, and you are not overpowered, you are in the range. If you feel either of those, stop and address it.