If the difference was not that big, I would say they are lazy... but they may be cheating since that's way too big of a gap.
My live chess rating is 1200 and my online one is 1600. The difference? I don't think much when I play live and just do it whenever I want to kill some time. Online chess, I take my time to think through my moves.... well sometimes.
i dont understand how people who have 1300-1400 rankings on live chess have 2200-2300 on online chess and do not make 1 mistake yet wen u play them 15 min. live chess u smoke them out of the water