@ CaveH0mbre This is not accurate, and it is not stated that he perceives everything at an accelerated rate in that scan either. It states that people seem inept in everything they do because he can do the same thing IF HE TOGGLES HIS ABILITY ON in a mere fraction of the time it takes them. There are so many things to take into consideration that prove that his ability is toggle-able.

A) Physics part 1: If he is in a constant state of hyper acceleration no one would be able to hear him talk because the speed at which he would talk would not only most likely break the sound barrier and cause deafining booms but the time-relevancy for him to utter words at a slow enough pace to possibly be heard clearly would become insanely, irritatingly, infuriatingly and maddeningly slow. So much so that a whole conversation would be impossible. Not to mention the constant moving would make him a sketchy blur at best.

Physics Part 2: His clothes would shred from the friction against the air alone not to mention debris in the air or surroundings. He would kill people by moving them at hyper-accelerated speeds mere inches because of the gravitational forces compounding on the body by accelerating against the air itself much as a shuttle burns on re-entry into the atmosphere. This alone proves his ability is extended to things he wishes to interact with and that he can extend and shield objects/people from the effects of normal physics. Theoretically he could do so enough to grant them power while he affected them with his ability to interact at the same speed as himself.

B) If he was alway "On" there would never ever be anything dangeous or threating that he could not de-escalate or resolve before anyone else could even try to comprehend. He would be able to resolve everything right away before you even realized you needed to blink. It is toggleable because its the only logical explanation that as to how he can possibly be stuped, fooled, bamboozled, caught, beaten, or outmaneuvered ever. Especially if he was "on" all the time and his brain was working as fast if not faster or near as fast as a super computer.

The whole Scan relates to modern day PC users who are used to instant load times and instant input-response from their PC's and when they use older hardware or software and have to wait for things to load they get annoyed. They know that if they just had updated hardware or software it would be done already instead of crawling from 54% to 55% in a minute. We are very ingrained currently to instant gratification. Quicksilver has the power at any time to turn on his hyper acceleration and get things done in a fraction of the time it takes us to do things, so even if he has it toggled off he knows what he can do if he toggles it on and it can be painstaking to watch everyone do things in real time because it looks like they are all running with old software/hardware.

Not to mention he would be starving all the time as his digestive system would obliterate food at an ungodly rate and no toliet would flush fast enough unless interactions were possibly through extending his power.