Thiel Owners

Beetle - I have not yet made a direct comparison of single vs bi-wire.My working assumption from multiple inputs is that there will be an improvement; the degree and cost-effectiveness is my concern. Additional to your experiences and those of others, my personal experience is from the development of the CS3 in 1982, which was bi-wirable. Those development experiments were conclusive and cost-effective.
Thiel's reversal to single-inputs was one of those cases of market consideration, and control. Bi-wirable speakers are viewed, especially in the day, as "requiring" double cable runs and/or dual amplifiers to meet their design goals, which significantly increases consumer cost. The other rub was that some users chose radically different cable runs which degraded system performance. Jim could not tolerate that system degradation and Kathy felt that adequate consumer education was not achievable. 
All of my cable runs are bi-amp in the same jacket, which costs very little more than the same wire with single terminations. I'm getting close to building some crossovers to test.

What a bummer that we never heard any more about this experiment featuring Thiel speakers and writers at Rolling Stone:

https://www.cnet.com/news/rolling-stone-magazine-discovers-high-end-audio/

tomthiel, did you ever hear about the results of that "test?"

Prof - at that time I was not tuned into Thiel Audio nor Rolling Stone, so I heard nothing of that "test". It would be interesting to know of any follow up or results.