Yes, its ture. The Spiker is not like Halo's Covanent Plasma Pistol where it just charges up the longer you hold it, its more like a... well i dont know yet, but it dosnt just charge up the longer you hold the trigger. What the Spiker does it it charges up to its max for about 1 second, then restarts its charging phase. The charge is at its max right after the sound peeks (about 2 seconds of holding it). If you fire then, the damage and splash damage will be at it's max. I know all this because I've tested with it against squaddies
. Now you know. Happy hunting!
PS. This is for Strygun's CC weapons section. Ive noticed this a lot in the caves.