No. For sure no. 

I've answered short but intact response and I receive good reward. I also made a long comment but received small percentage of reward.

For me, the reality is Musing.io focuses on the "quality" of answers rather than the "quantity" of words being put. Anybody can just beat around the bush if they wish to but Musing's focus is to provide a Question and answer platform focused on providing solutions to questions. No matter how short it is as long as concise, Musing will surely reward you.