8 minutes at 180 knots = 24 miles somewhat over the top methinks and in some areas will cause all sorts of confusion as places 48 miles apart are not an oddity on the Eastern Coast so if you transit between 2 places 48 miles apart at better than 180 knots do you have to alert both ????
This is really silly stuff, what happened to common sense 10 miles inbound for low performance < 120 knots and 15 miles for high performance.
Seemed easy to me and has stood the test of time.