He might be pulling himself from all over the universe, but that has nothing to do with her speed. You don't have to be moving "much much faster than light" to block pieces flying at you from all over.
Heck, Spider-Man always dodges things coming at him from all over, and I've seen a few instances of him having multiple images in one frame to show speed, but that doesn't mean he can move FTL.
I've also heard from somewhere that post crisis Superman can't break lightspeed all the time, and Superman is definitely faster than Diana.