Can be all over. Anywhere that you get a mix of turbo props and the controllers don't have a jets are always faster attitude. It really isn't an issue for us and alot better than getting an extra 20 miles and being speed controlled back to jet approach speeds inside 15. Nothing worse than getting stuck behind a 146 ploding its way in
Its only ever the ones that are used to turbo props, alot of them its known voices and its always a request with maybe a tatical leave it until we request to slow down for the 220 to 4, if they haven't heard from us by 5 miles they chuck us to tower.
You have to watch though if you keep hammering in and don't use standard speeds near none TP airfields that you don't screw with the intercept vector as you will go crashing through if they haven't seen you still doing 230-250 at 10-15 miles and you don't edge it in early.
I might add at 220 to 4 we are still back at Vref +10 and fully configured by 2 miles.
The FL70 isn't nearly so common and would normally only become available if you have shown in the past off a visual that you can get down. Say abeam the numbers at FL70 request a visual then keep it inside 4 miles and all nicely set up by 700ft on final.
If we are lucky an ABZ controller will be along to us what they have seen TP's do. They really are the master of intergrating Heli's, TP's and Jets. And some of them used seem to know the limits better than the pilots do.