There have been numerous occasions where the 146 has been given silly speed limits stream arrivals and to stop it overtaking some of those turboprops on the way back....quite frustrating for Henry &co as it's plainly obvious that with a good 100kts or so on the TPs they'd eat it alive if given the chance.
Remember its 250kts speed limit below FL100, most turboprops fly 240kts in descent, not much difference really.