TP's can keep high speed in the descent for longer. We can stay at 265kts to 6 miles if reqd with a high rate of descent while the jets are back to 210 miles behind. I normally keep it intil 3 miles to the LOC and intercept at 220kts, depending on the approach and the angle to the LOC (no point going through if the controller is unaware of your groundspeed).
This means on a short route (1hr-1hr20) TP's are only a few mins slower, if at all than Jets, yes a little louder in the cabin, but for 1hr who cares.....
In the cruise our TAS is around 330kts.
And with smaller cabins, the pax have less boarding times and baggage reclaim time.
I still fancy flying a biz jet though....I think.