[Dantilla]

I'm no expert on the Corsair, but my little Bonanza has similar stall strips.

They do not insure both wings stall simultaneously, or reduce stall speed.
At high angles of attack, they create little vortices that buffet the horizontal tail, so the pilot knows the wing is right on the verge of stalling.

On V-tail Bonanzas, the wedges are right next to the fuselage.
On Bonanzas with conventional tails, the wedges are outboard, as shown here on the Corsair.

Edit: "It will wobble a bit" This is the airplane telling the pilot it's close to stalling, time to reduce the angle of attack (lower the nose).
These may help stall simultaneously, but only in coordinated flight. A bit of slip or skid (uncoordinated rudder) will make the wings stall individually.
Also- The Corsair is a torque monster. Adding or reducing power quickly at low speeds requires aileron & rudder inputs to remain coordinated.