For Info Only
Dash 8's do a 2 times profile very nicely which keeps everyone out of the turbulence until the last five minutes(below 10,000ft.) and speed is coming back then anyway for the straight in approach.
Secondly, even a Dash 8-100 will beat any jet to the runway in the last 30nm. Trouble is only the Dash 8 drivers know it and the controllers keep wondering why they have to give the Dash "boats" so many slowing vectors to fall in behind the jet "floaters"!!! Heard one day a Dash driver calling the ground controller after landing and vacating to say "... and we still have the slower preceding jet traffic in sight."