I've got several Prism kites, Ozone, Alien, and 3-D, and so far the wind ranges seem to be accurate! Myself, I feel a bit more comfortable with a kite that pulls a little less, more at the lower end of it's target range than the upper end!! But that's my opinion and what I like, you may have other ideas!!
PS: I've had a stroke that compromised my balance, so I stay away from "the pull"!!! That's why I choose to go to another kite, if it just flies, it's good to go!!!