Some believe this based on the fact that when Gongsun Zhi escaped, Huang Rong AND Li Mochou did not dare to chase him further.
However, from his first fight with Yang Guo, he was actually feeling pain from exchanging palms with Yang Guo. This suggests his internal energy may be lower than Yang Guo, who was still below Li Mochou at that time. So it seems unlikely that Gongsun Zhi can be > Huang Rong. It's more likely that Huang Rong just didn't have a compelling reason to chase him.
Your thoughts?