Do players change pace as a tactic?
and usually use most of the rest of the clock in the rest of the game in a well matched game
and if my opponent is taking more time than previously then maybe i got him stumped; it rarely happens for me but, dang, it's a nice luxury to get ahead on the clock for once
i have people abandon or worse- milk out 25minutes of clock when they blunder and i will wait them out; this usually happens when my ipad battery is at 2% and goes dead then i have to frantically reconnect on iphone to not autoresign myself but i think you are talking about something else
what time control are you talking about?