Trend Micro's response:
https://blog.trendmicro.com/answers-to-your-questions-on-our-mac-apps-store/
Looks positive to me. Trend Micro stands behind their products and provides a few details that can be verified independently.
The ball goes back to the journalists and "security researchers." The story will be equally interesting if they're eventually caught grabbing media attention for self-fame or behind corporate espionage.