WQ, I understand your concern and it's the same one that I had. I looked online to see if I could even find proof of him being active recently, and it looks like he's been active under... another site that he visits and has linked in his profile. So he's still around online, just not posting particularly frequently.
I'm not sure that this is him, but I also don't have any reason to act as if it isn't him, not yet. I do hope that if it is him, he'll post soon to give us some sort of assurance of that fact. Copying over old reviews from GameFAQs doesn't exactly scream "It's me and I'm back!" and the "I'm back" message on April Fool's Day wasn't a confidence builder, either. I definitely know someone who thinks it's just hilarious to pull 'pranks' like this--even though it's pretty obviously not--so I'm not sure what to think just yet but will act accordingly if anything changes.
"Too often we enjoy the comfort of opinion without the discomfort of thought." - John F. Kennedy on reality
"What if everything you see is more than what you see--the person next to you is a warrior and the space that appears empty is a secret door to another world? What if something appears that shouldn't? You either dismiss it, or you accept that there is much more to the world than you think. Perhaps it really is a doorway, and if you choose to go inside, you'll find many unexpected things." - Shigeru Miyamoto on secret doors to another world