I doubt they're well practiced in it. Throwing it in on a second FK seems ridiculous.
Well actually - and this is something that Silva pointed out last week in fairness - we don't use zonal for all set plays.
For FKs, we push our line up to the edge of the box, like Liverpool and City do. The system is then man marking, with every player designated someone.
We've used that for much of the system so it's not exactly new.