Actually, if you played Tribes1 in the beginning you'd know that the original handgrenade was almost exactly like the one we have here, tho it had smaller hitbox(can you call it like that?).You had to charge it too. I'm guessing you have started to play with some client that had max throw script in it and never knew how it was earlier.
I am not using a max throw script, my t1 client is unmodified with extra scripts like max throw. I do have to charge up, and the mod is called renegades which is what I mostly played because it was much faster than base.