It does: if it's in the middle of the taskbar, the area is infinitely long only on one axis, you still have to move your mouse on the correct place on the X axi

It does: if it's in the middle of the taskbar, the area is infinitely long only on one axis, you still have to move your mouse on the correct place on the X axis (as determined by the icon size). If it's on the far left, the target area is infinitely large on both axes, just throw your mouse somewhere down left and you'll land on target 100% of the time.