Steve,
I do agree with this. I feel that much as the BG NX 22uF 6.3VW cap is absolutely outstanding compared to all other electrolytics, and ranks equally with a good filmcap like the Evox MMK, the teflon wipes the slate vis a vis all other filmcaps and gets my unreserved endorsement. These caps are just wonderful, and such is the slightly irrational world in which we live that I would not be surprised if the minor coloration introduced by a teflon cap actually beats a straight wire FROM THE SUBJECTIVE POV.
The debate between the objectivists and subjectivists is as bitter and trenchant as it ever was; I've given up saying things like 'should be' and 'could be' because it is a fact that both the sonic observations AND the observer are a moving target, and 'sound' as we audiophiles know it, is very much subjective, like food, and fashion, and art.
I have just ordered another tranche of teflon caps, such is my confidence. I've been surprised by the demand; it's strong, and ongoing amongst my customers, and not one of them has been disappointed, all reported marked improvements, particularly in resolution and deep bass. That's good enough for me!
Cheers,
Hugh