(Three out of) four experiments is anecdotal for sure, but the result meshes with more established instruction following benchmarking (although DeepSeek V4 pro does not top these): https://artificialanalysis.ai/evaluations/ifbench
I found the writing clear and quite even handed. The lead is a bit salesy, but leads typically are. Knee-jerk dismissals based on vibes that something is LLM generated are quite low-effort.
It's picking strange tasks that don't really play to GPT-Pro's strengths (that model is roughly comparable to Mythos, intended for very hard reasoning and research-level problems) and then completely ignoring quite a few cases where GPT-Pro actually got some things more correct than DeepSeek did. The auto-AI ranking is just not reliable for this stuff.