What you're saying highlights my point--there are a few different stories floating around about how Subaru "fixed" the problem and we don't know what is exactly the truth. Someone over on NASIOC (IIRC Michael Yourt or something like that) suspected his '09 was affected and in the end it did fail around 25k miles. He did a really good job harassing SOA about the problem and eventually got out of them that the cranks (not sure if it is all or a subset) were not prepared properly for the silver bearings. I understood it as them still using silver bearings but having the cranks cleaned to the necessary specs. Not sure though and I think I read someone who had a Blackstone analysis on their later build date and there was zero silver, which was support what you said.
And to be honest, who knows how reliable any of the information I cited is. After all, it came off the internet.