Is it true ?

[ForgottenWarrior]

Some guildies were talking about how armor works in PvP, one said that armor should be divisible by 100. He further explained that the amount of damage we receive with 2000 armor and 2099 armor is same. So, it is useless to have additional armor than keep it with divisible by 100. Is it true ? IMO every single extra armor helps in pvp. Need suggestions guys.
He also said that critical should be divisible by 7%, as if you have 35% critical and someone have 41% critical it will have the same damage instance. I'm not sure about why there are two upper and lower boundaries in these two stats. Or it maybe a false assumption.

[Gouiwaa9000]

crit only affects the chance you have to crit , not the damage if the critical hit ( always +66% ) . idk about the armor , but i feel the diffirence if i gain or loose 100 armor for pvp.

[Bluesparky]

Well armor increase will help u receive less damage.

Simple fact :: More armor ~~ More Damage Reduction ~~ Less the damage u receive.

More info at http://www.spacetimestudios.com/showthread.php?346477-Guide-Armor-Valuation

[Horme]

You cant feel +100 armor at level 56 in pvp, because the %damage reduction only increase a bit. +100 armor in level 10 will add more %damage reduction.