Old news indeed! I posted this 10 days ago.
You don't actually address anything related to high-speed trading. Maybe I've misunderstood you.
4 million coins per day is high volume, not high speed. How fast are some of those traders getting in and out of bitcoin? According to the article implies this guy is doing it endlessly day in and out and is in and out of bitcoin (i.e., buy bitcoin, sell bitcoin, buy bitcoin, sell bitcoin) very quickly, within seconds or minutes.
The low fees help support the HFT behavior (because it keeps the activity cheap).
Do you have anything to say about the frequency of the trading from this guy and others in China and how it may impact price volatility for the rest of us regular folks?
That's old news and it's irrelevant now. Chinese exchanges were allowing 0% fees trading and the volumes were phenomenal; 4 million plus coins per day was the norm. Fees have been implemented in the last week and volumes on Chinese markets have plummeted to below US market volumes. I think we can call it high-speed disappointment for Zhou Shuoji of Beijing. He'll have to find something else to point his computers at 24/7