I believe everyone had experiences working with people who were fast paced workers. Typically these people are very career and goal oriented, they want to get one stuff done and out of their ways quickly so that they can move onto the next. They are always seen as productive workers, but I personally found people like this normally take actions before they think things through. So, the decisions they made usually were problematic, and often needed other people to spend extra time to reverse or fix. Unfortunately, people like this are always praised as productive,  proactive and quick thinkers, and always got the promotion at work to be the decision makers, and I don’t think it will do anything good for any company or organization. So, if you ever hear someone was praised as quick thinker or some companies have fast paced work environment, you might not want to take it too positively.