you're talking as if all lightning has the same force. Also the instance of Wonder Woman being hurt by lightning was when she was also in water, which I imagine would affect them more. Wonder Woman may not have legit showings of her being FTL, but Thor has been hit by beings that aren't nearly Light Speed. Even Quick Silver was able to dodge Thor's Lightning on first try, Quicksilver can move around the speed of sound and actual lightning moves at 1/3 speed of light, this raises the question as to if Thor's lightning moves at the same speed as real lightning. Maybe it can, but in-character Thor may not use his lightning powers to his full extent. I can see WW taking advantage of Thor holding back and winning this battle.