Buffs have been around for quite some time as abilities trojans and alpha wolvers can perform and for bosses to become invicible. They have also been implemented into the game as discovered here.
Since the soon to be implmented "pets" will be able to give buffs, how much do they actually do? I would imagine it would be similar to UVs perhaps an attack buff would be damage increase medium. Also would the defense buff just increase your existing defense or also boost the defenses you do not have? If the buffs are similar to UVs would they be subject to the current caps?
Someone is getting a bit ahead of themselves... I think we should wait for at least more than 3 pictures to start running calculations and predicting doom/salvation.
If you're really desperate, there are some youtube videos of shenanigans GM's have done. I know one of which includes a GM dropping a Mug consumable item (like a pill) that gives the player a boost in damage. I don't remember where the video is, but if you search, you should be able to find it and calculate from the damage numbers how much the damage buff is.