and if you insist by saying that subs do occupy parts of the screen or it changes the way of the media or whatever , i'd doubt that if you really felt it during watching or is your feeling just a result of a mind meddled by the subconsciously assuming of "i did have felt" ,,,which i believe at least wont be felt by a ordinary people….

go read a psychology text book.

Anime has really helped me learn to read fast. I've always read at at least a reasonable rate, but I've noticed being able to read subs faster as I've watched more. Back in the days of VHS fansubs our anime club watched Kodocha. I remember having to focus so much on the subtitles I would spend almost all my time reading them half the time Sana was speaking, as she often speaks somewhat faster than average. Some years later, after watching things like Excel Saga, I watched a bit of Kodocha again. I had no problems reading the subs quickly and spending most of the time focusing on the rest of the screen. (In fact, as I had watched about half of Excel Saga just a bit prior, I kept thinking "Sana seems… lethargic.")

When watching something subbed, my eyes often glance back and forth between the subs and the rest of the screen so it's rare I miss anything, even if it's just noticing something happened so I know to back up a bit and watch again. It doesn't hurt that I almost always watch anime either alone or in a very small friendly group, so if I or someone else does miss something it's not a problem to rewind a bit.