[@Klomster] I was mostly just defending my 'space marines are meh' statement. Ogryns, by their fluff, should have better reaction time than their rules make them out to have. It may very well be they, in fact, do. However, being as bulky as they are, how awkward their movement is could balance out the fact they react to danger faster than the average human. Hard to say.

My statements about Eldar are more a general peeve I have with them as a race. Realistically, space marines Should have the fastest possible reaction time of anything in the universe (even if other things Also react that fast), shy of tyranid. Tyranid only get a pass because they're all connected to a hyper-intellect that commands them as a group and processes information from every individual organism on the battlefield simultaneously, so realistically a tyranid  warrior could begin dodging bolter fire as the gun is being aimed at him because a termagant sees the space marine with the bolter taking aim. But, again, magic space elves, so they can get away with cheating because they can.

As for necrons... the specific things I was referring to were canoptek wraiths. It's just fact that necrons have the ability to produce, in-mass, A.I. controlled robots that can phase in and out of existence in order to avoid incoming attacks. Being controlled by hyper-advanced supercomputers, wraiths have a faster reaction time than basically anything that relies on physics and not magic, because they have what amounts to an in-built invulnerable mode on/off switch that can be turned on at literal light speed. Why they can't do that with All their... well, everything, no one is entirely certain. Necrons don't make a lot of sense that way.