The differential widens
Am I approaching a chess.com record? The difference between my Blitz and Online ratings is almost 600 points. I was pleased to break 2000 online, while my Blitz game (apparently) continues to deteriorate.
Is this because Blitz is a measure of your gut instinct - a collection of habits that you have acquired over the years; and the older you are the harder it is to change habits?
I force myself to think when I play online - to consider moves and look for ideas that I do not instinctively find. Perhaps that is why in online I feel I am learning far more about chess, whereas Blitz just shows me I have many bad instincts and habits.