Its teleportation on steroids, because for them to even move their body to take a step forward, they'll have to teleport their whole body to respond to that movement and if they are bad at trying to control the info particles they eventually start to lag, why rimuru and chloe convo had some delay at first. So to actually do that, their thinking speed have to be instant, tho some achieve this by copying others like guy and shion, others try to understand it, like rimuru, ultima, dagruel and luminas. Then there's the mfs who happen to naturally be atune to it because of their ability or something unusual like raw force, like Velzard, Michael, Chloe, Milim, Veldanava and Feldway. Essentially speaking they are different methods to achieve it, they teleport while physically moving, but they aren't really teleporting nor moving essentially breaking the normal laws of motion
They aren't unaffected info particle per say, they transfer information in 0 time, in others words even stopping time which makes time 0, it'll appear normal since info particles already doing that and volume 21 did say only ONE law exist there, everything in tensura follows the laws of physics but some are on steroids because their world have magic and shii