The way people talk you'd think Jim Thiel knew he was going to get sick and die in his mid sixties. He probably thought he had another decade or more left to figure out how to turn the company over.
@shadorne, as someone who has a very similar philosophy to yours and who also owns some big active ATCs, I can tell you that at least some Thiels really are great products. I have a pair of 2 2s from the nineties and they are truly great for what they are. They are just such a joy to listen to and were never terribly expensive. I've also got a pair of 3.7s and they are a fantastic product. I replaced a pair of b&w N802s with the Thiel 3.7s and I've been a little bit mad ever since. The thiels are so unmistakably better. Better bass, better midrange, better tweeter, better soundstage. Just way better. Why did I waste those years on B&Ws?
I don't know if the first order crossovers are really important. I suspect it was mainly Jim's passion to make great speakers rather than any particular design philosophy. Whatever it was, man these things are great. They won't play as loud as the ATCs and I'm sure if I wanted to do a lot of careful comparing I could find several things the ATCs do better but the Thiels are great.