I wonder if it was Mace Windu who guarded the temple....
Anakin: *ignites lightsaber in front of the younglings*
Mace: Walks up. You threatening my kids, motha****a.
Anakin: *nods*
Mace: This is some ****ed up repugnant shit. I'm a mushroom cloud lay'n motha****a, motha****a. Everytime I see you asaulting some young'un, I'm "superfly T.N.T," I''m the "GUNS OF NAVARONE."
Anakin: "Don't underestimate my power!"
Mace: Shiiiiit *****! That's all you had to say!
Pulls out pistol and shoots Anakin dead three times.
We don't actually know how long the fight took, and we don't know all the details. The hologram actually only shows us the last two seconds where he kills Cin, we can't say for sure that Anakin pwned him, though it's believable.
Anyways, he was most likely a pretty skilled swordsman, as he was the jedi temple's chief lightsaber instructor, and didn't Dooku say to Grievous something like he wouldn't be able to beat someone like Cin Drallig without fear and surprise on his side? And if the game's anything to go by, Cin Drallig is awesome, he's insanely quick with some deadly moves.
I think what leads most believe he got curbstomped was the fact that what we do see, Anakin kills him while choking another Jedi simultaneously, and to fight others as ou kill the temple's battle master, thats pretty impressive. Plus if Sera Keto was Cin's most prized pupal and his padawan or whatever, she had to have SOME skills and was sure to be with Cin, which would imply that Anakin slayed her at the same time.