I had a friend years ago with laser focus. He was read an article on his laptop and I was behind him. I asked him how he tolerating the flashing chumbox ad. "Why don't you install Adblock Plus (the ad blocker of the day)?". He had to look around his screen for a second to find it. He said he didn't even register it before I told him about it.

Even a single dead pixel would seriously distract me but he didn't even notice the gif of some disgusting medical scam ad showing elbows or knees or whatever.

He could also fall asleep seconds after hitting the bed. I need at least 10 minutes - at least. Sometimes an hour. Maybe it's a related phenomenon.

Some people just seem to ignore external stimuli better than others. Whether ads whose purpose is brand recognition work on them subconsciously, idk.