Today was listening to a KGS plus Guo Juan lecture. She said, to get strong, it is good to play many fast games and get killed many times. Just make strong shapes even if slow. You don't even need to attack, opponent will often just collapse on himself.
During the workshop, she told when she was training to become a pro, she often would play one hundred games a day, just very fast games. 5 minutes, 10 minutes, and lots of them.
Interesting. I usually stay away from fast games because of the interruptions in my household. Wondering whether I should re-think that.