from the center of the wheel/hub to the edge of the fender in a straight line up. From Icon, he got 3" of lift (23"-26"), turned them down about 5/8" (1" thread showing) and netted about 24.5" (1.5" lift).
Droop will be the same regardless of preload (maybe use limit straps to reduce the UCA banging off of the frame?). 5/8" reduced preload=1.5" is pretty significant. That UCA and LCA pin offset must be reducing the angle noticeably.
@metallikatz3 any thoughts on those rear springs? Asking for a friend..