Take the information with a grain of salt though
Take fleshpounds as a quick example.
Site still claim that crossbow have a 7.8 headshot multiplier (it is 6.0), that fleshpounds take 50% damage from crossbow headshots (it is 75%), players are instantly killed by one hit on suicidal (with 100/100 you always survive one hit) and that fp will enrage if he take approximately 360 damage over 3-5 seconds (it is 360 damage over 2 seconds).
Site also lack a lot of information, such as:
That fleshpounds take double damage(!) from LAW+hand grenades (edit: and Pipe bombs), a quarter extra damage from grenade launchers, 75% head shot damage from crossbow, shotgun, winchester and m14ebr - and half(!) from everything else.
Fleshpound will pick a new target if his original target dies or leave line of sight.
Fleshpound will stop enrage after he hit his target one time (so if you continue to shoot at the fleshpound while he is leaving range he will enrage again and kill his target before he have a chance to get away).
Good site for some initial information, but as i said; Don't believe every word
(does the site list weapon damage, didn't find it at a fist glance).