Originally posted by Nephthys
The 3 swordsmen with Mace knew what Palpatine was going to do. He leapt right at them after slowly drawing his saber and threatening them. But they could do all to jack and shit to stop him because he was moving so fast (EU only). Yoda didn't react in time to stop Sidious' FLightning even though, again, Sidious clearly telegrathed the attack beforehand. Jedi are not gods.
That's clearly a case of stupidity. Sidious, no matter how fast he is moving, is not traveling at blaster bolt speeds yet the Jedi can block bolts. Therefore it wasn't due to his speed. So why weren't they able to act to him... Well, to be honest, I really don't know (if we exclude the EU of course).
Just because they see an attack coming it doesn't mean they can stop it.
Sure. As I said they can be overwhelmed due to non-linear attacks and numbers.
I don't think you realize how fast a beam of light travels, it's literally the speed of light. So no, they're not that fast.
Once again, irrelivent. Vader will know where the beam of light will be the same amount of time before hand that a blaster bolt will be. Meaning even though it's traveling at insane speed he will have the same amount of time to act.