YYZ,
Interesting. What he says is very complimentary - in fact he claims that Thiel 3.7 approach "active speakers" in transient accuracy. That is quite an accomplishment with a three way with passive crossover. He says,
I prefer Active speakers generally because they have an ability to respond to transient information better than most passive systems I have heard. The Thiel is the FIRST passive speaker I have heard that really seems to be able to approach active systems in this regard
(my emphasis on "first")
IMHO, The spectral decay is ok - what you would expect for metal drivers (some ringing but not to worrying). The midrange reponse is outstanding - very even and great dispersion - great realtionship between on axis and off axis - this will sound very very natural. I have not heard them but they would make an awesome choice. I'd pick them over the B&W's just from the response curves in Stereophile's December issue. Let us know what you think when you get to hear them.