Here is one of several studies that has examined wave energy dissipation distance from a sample of recreational boats at different speeds/weights (ballast vs no ballast).
Nothing particularly surprising, a ballasted G23 creates a bigger wake at 32mph than a 200, both make bigger wakes if they are plowing around at 10-12 mph, and energy dissipates over distance travelled.
AMC+Wave+Wake+Study_HB4099+Motorboat+Working+Group+REPORT.pdf