I don't think it's a coincidence just like any other piece of gear we have in our HTs it's subject to fail at some point, I believe the failure rate for the PS3 even after 3 to 4 years is 4% I will have go back and find the info to be sure on the numbers.
The thing that kills me when I see posts on the gaming boards that say's update whatever killed my PS3, so here is what I ask and this is the usual response I get.
Q: How do you know it was the firmware and not anything else?
A: I just turned it on and started downloading and after that it was bricked. or Dude it was working fine yesterday.
Q: So it was working fine yesterday and now it doesn't, have you ruled out other possibilities just to be sure?
A: Dude your just not getting it, my PS3 was working yesterday before the firmware and now it's not so it's the firmware.
You get the ideal towards the end of going back and forth I tell this person you can't just say it's the firmware if you failed to rule out all other possibilities. I'm not saying it's not possible but for the love of gaming rule out everything else first before making such a claim.