Gordonf...
I agree totally.
A high speed descent below 10,000’ at say 320 kts to 5000’ vs 250 below 10000 will save around 1 minute:30 seconds. Never been one to see the point...burn more gas, increase the chance of getting out of shape, etc for what.
Only reasons I see for speed if you have been held up and need the speed to get down. In the normal event 250 kts gives a smidge extra time to finish the coffee thank you very much..