Not stalled !
A landing should not be made in a stalled condition as we all know as an aircraft stalls the C of P moves aft and the nose will drop out of control as all lift is lost. Roll control would be marginal to say the least ( within one or two knots of the stall most light aircraft can be rolled to the right with small amounts of left aileron & vice-versa) so recovering a wing drop would be interesting !.
The airspeed at the touchdown may well be below the normal stall speed but this is due to Ground effect and the aircraft is not stalled.
Once the aircraft is on the ground stalling the wing might be an advantage as the drag rise in a stalled condition will help slow the aircraft and the stalled wing will not be suporting the aircraft putting more weight on the wheels thus increasing braking action. Only aircraft with powerfull pitch control can take advantage of this so you can forget it in the PA28 but the DR400 and the PA38 can use this aerodynamic brake to an advantage on slippery runways.