I'll be willing to eat crow if I'm wrong, but I'd bet quite a lot that there is no such article, at least not in an EGM.
I own all issues of EGM from those years (they're in storage, so I can't check them, though), and although I wouldn't have remembered such an article even if it existed (since I don't care about Clayfighter or Tekken), the fact is that EGM is just about the most common gaming mag from that era. If NO ONE can confirm that one guy's post, it's my belief that the whole thing is a hoax of some sort.
Again, it's just my gut feeling, but it's also the most likely answer for why no one has ever been able to confirm it.