I don't think so. More than likely, English is not the author's first language. As a one-time ESL teacher I noticed that students from other cultures often used

I don't think so. More than likely, English is not the author's first language. As a one-time ESL teacher I noticed that students from other cultures often used exclamation points in place of where a native English speaker would have simply used italics. That is to say, they use exclamation points to indicate emphasis rather than excitement. But who knows, maybe the author just really is excited about their topic (!).