lots of people can notice that. my last job involved meticulously timing our software's input-tp-display latency, testing viewers' responses to it, and fighting for each and every ms we should shave off of it.

For my sins, I have recently been called upon to cold boot and then provision a few dozen Samsung tablets by hand. The "laggy Lagdroid piece of lagshit" pasta has been repeated a lot. I swear to God it just ignores ten percent of touch events if it's doing anything in the background.