Exactly. I worked with a few people like this. Claimed to work 7-8 basically. I would see them drop for a hour at a time several times a day, be unresponsive for hours, and hardly get anything accomplished, and when it was, it was either broken or poor quality.
Celebrating can be considered immature. I'm out of compassion and empathy for idiots though. They will absolutely face the consequences of their actions and it doesn't mean I have to help them.
Answer your question. The article says that.