Northern,
It actually wasn't me. You know how much I'm a traditionalist as to English brewing, brewing history and lore, etc. It was the company culture, I guess I'd call it, headed up by Greg Hall, who created many and spearheaded most recipes. Add a few things in - IIRC, they entered their Honker's in EPA and IPA in the English IPA, and not American variants of these ales, in BJCP competitions; and on balance I'd proffer the guess (and mind you, I was not a brewer - at one point I was National Distribution Manager, and that's it. And I wasn't exactly happy, nor was Goose, but an entirely different and irrelevant story, so enough there) they'd say they were making American beers with some English accents. Then again, perhaps not. Perhaps Greg thought their beers were more English than I'm giving them. Sorry I can't offer more.
On the specific questions you asked: Their yeast truly was wonderful, and I had as much as I could use, as fresh as it could get, in pitchable quantities. My 2 tier system was actually right below/beside the brewhouse vessels (vessels spanned 2 floors), so I'd often brew early in the morning, or stay after work. I regret I have no idea where it came from, its code, or its specs. I probably never thought to ask them to ranch it for, well, a couple reasons. Too bad, truly.
No, to my knowledge, no beers were bottle conditioned and all were filtered. A friend of mine made the most extraordinary barleywine I've ever had - beautiful maltiness over cloying sweetness by the judicious use of munich malts - and aged it for a year, I think, in bourbon casks. That was an experiment and it may have been cask conditioned, but I'm not certain. Nothing else in production bottling was, to my knowledge, anything but filtered.
On the other hand, it would not surprise me at all if one of the brewers took it with them. There are 4 I know, worked with. Matt Brynildson (Firestone Walker), Jonathan Cutler (Piece, Chicago), Phin de Mink (Southern Tier, NY), and Jim Cibak (I don't know where Jim is these days. It was his barleywine I spoke of).
I have nothing but admiration for all 4 of these guys.