Well we all kinda suspected that after Prof Abbot accidentally told the world back in March. I don't think the PA connection is a surprise to anyone!
I'll confess it was a surprise to me.
I'd not assumed LEK had come from anywhere, though, due to lack of solid information. But I figured there was no reason to favor Pennsylvania because that possibility seemed to be based on some faulty reasoning, the phone number from the Notes Page. And I was surprised when Agent Velling, in the follow-up article in the Seattle Times, was quoted as saying there was a promising lead that pointed to Pennsylvania. I thought he was mistaken; now I see he was telling us as much about the case as he reasonably could -- maybe even more.
I only wish it had been made clear when he retired that he was still working on the case. When I heard that he had retired, I couldn't help but feel that LEK's birth name would never be known, & the reason for her radical act -- abandoning her original identity -- would never be known.