Here in Toronto the controllers always request "170 to the marker" and it doesn't seem to be a problem.
For a decelerated approach on the A-320, Airbus says enter 180 ("S" speed ) into the MCDU at the marker (FAF), so they seem to think the aircraft can cross the marker at 180 and be configured for landing by 1000 agl. It's knowing the capabilities of your aircraft and what you can do with it.
As has been stated above some airlines still want the aircraft dirty by the FAF. Great way to waste fuel.
Thermostat.