I can detect it pretty well, but that was just one example.

No person starts a summary that way, it's over-the-top and meaningless. I have seen AI do that many times when summarizing something related to security, though. Claude often says "CRITICAL:" or "CRITICAL VULNERABILITY:" or similar, especially when you jam the context window full of junk.

I frequently push back on people being hair-trigger about calling things AI, but even I’ve gotta admit, that’s exactly what Claude code says if you ask it to do a security review and it finds something. I’ve seen this numerous times.