It is actually.
The thing is that there are two reasons why:
The first is by the very shape of the wings. When the flaps on the wings begin to engage the air catches the front of the wings and acts on them with extreme amounts of pressure and the leverage from the wings upon the body of the aircraft actually forces the plane to turn. The leverage of the wings upon the body makes it turn circles around any conventional fighter in the world to date.
The second is also because of the wings. I cant explain it without confusing myself. So here is a picture:
So even though the rear flaps are smaller than those on the F-22 just as much air actually passes through them, maybe even more, which enables the plane to perform post stall maneuvers.