It's tough to say, I would have to look at the specs/speed feats of the robots he battles but I would assume his speed and reflexes are around the speed of sound, really quick. He has reaction speeds above the speed of sounds, seen when he stops all those projectiles from hitting him.Of course this would be further improved by The Speed geass.
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You beat yourself up with your past. Don't blame yourself, blame the world. Blame God. Blame me.