I know he obviously didn't mean everyone, the problem is that it wasnt even anywhere close to the majority who thought that.
Like Barozi pointed out, PS3 was outselling 360 every year since 2009 and even with all the mistakes Sony made early on they were able to beat Microsoft comfortably in Europe, Japan & RotW which gave them a slight lead worldwide.
It was more commonly stated on this site that as long as Sony didnt give up a year head start, make a console $200 more expensive and harder to develop for than they would rebound (not to PS2 levels but better than PS3)
Sure, a small group of vocal users wanted to make people think that Sony was going to go bankrupt and exit the console market but that was far, far from the majority of people on here.
Sorry, but that's not how I remember it. How next gen would play out was completely up in the air. 360 fans thought MS would continue to make gains with the help of their infinite cash reserves. PS3 fans thought the PS4 would make a comeback because Sony learned from their mistakes. Nintendo fans were completely torn one of three ways. Some agreed with the PS3 fans. Some agreed with the 360 fans. Still others thought it was the end of consoles as we knew it. There were quite a few people who thought that if the Wii U was struggling this much, and it was the successor to the highly popular Wii, than the PS4 and XBO didn't have a prayer. So no, a PS comeback was far from the consensus on this site.