With no hacks injected I never noticed any different in jump height from myself, the map to check jump height on is SHORT FUSE near the truck, reason over the dumpsters there is a ledge, it is not possible to jump on this ledge without the assistance of another players back unless you have some sort of hack jump going. This has been tested many times by a few of my friends and myself, with verious speed gear, backpacks, and equipping knives, handguns and nades as well as specs.
Now a person can jump a little higher in game with:
- no backpack or a packpack that has no negative speed reduction on it.
- any speed gear
- spec
- higher portable weapon such as knife, nades, pistols.
But the ledge in Shortfuse can not be gotten onto using anything other then another person back or hacks.