Mace Windu is incredibly fast...
From the RotS novel, "Vaapad, the seventh form of lightsaber combat, takes its name from a notoriously dangerous predator native to the moons of Sarapin: a vaapad attacks its prey with whipping strikes of its blindingly fast tentacles. Most have at least seven. It is not uncommon for them to have as many as twelve; the largest ever killed had twenty-three. With a vaapad, one never knew how many tentacles it had until it was dead: they move too fast to count. Almost too fast to see. So did Mace's blade."
"Mace pressed back the darkness with a relentless straight-ahead march; his own blade, that distinctive amethyst blaze that had been the final sight of so many evil beings across the galaxy, made a haze of its own: an oblate sphere of purple fire within which there seemed to be dozens of swords slashing in all directions at once."
From Shatterpoint, "And even hurt, lurching drunkenly, Vaster still could whip his arms in blindingly fast raking slaps at Mace's head and wounded neck. But where Vastor's speed was blinding, Mace's was invisible. Not one of those slaps connected.
Before Vastor could even focus his eyes, Mace had hit him six times: two thundering hooks to his short ribs, a knee slamming hard into the same thigh he'd hit before, an elbow snapping up to the point of his chin, and two devastating palm strikes to either hinge of his jaw."
"Then he hit Vastor twice in the nose before the lor pelek could even blink."
As for his relfexes, Mace Windu has defeated Greivous in saber combat and Greivous can attack up to twelve times per second. He also "defeated" Sidious who moved so fast he was described as merely a blur and was able to kill three Jedi in as many seconds.
He also has Shatterpoint which not only allows him to find the weak spot in objects, but in a duel as well. Meaning he can use it to find a weakness of Spiderman. For example, in RotS he uses the Shatterpoint technique against Sidious. In the lightsaber duel it is the window, so he cuts open the window making Sidious sacrafice some of his speed in order to use the force to keep himself from slipping. This is ultimately what allowed Mace to win.