@Mor - It probably depends on what kind of internet research we're talking about. In some cases, it's a matter of looking up scientific research. In others, it might simply be a matter of looking up copyright infringement or something like that, in which case they won't really be working with information, so much as recording its presence.
Think about the fact that there must be people out there who basically just go through youtube all day to look for illegal videos. I don't think they remember every single video they ever found.