If you space one side exactly as opposite the spacing of the other side, as The Builder says, you get an opaque appearance fence - at least when viewed directly perpendicular to the line of the fence. It is undoubtedly true that the wind resistance would be greater than if you offset one side (when you can partially see through it).
The greatest wind resistance does occur if the wind is blowing perpendicualr to the line of the fence.
But I wouldn't worry about it - if you've done the fence post bases right, it ain't going to blow down in a hurry. It is more to do with your personal choice on appearance grounds.