Am not familiar with TT line...is that WF, DT, or?
The Triangle Taper lines have been around for many years now, probably close to 20. Although less popular than Cortland or SA lines, they have a strong following, particularly among anglers who like slower, progressive action rods like Winston WT's, Scott G series or older Orvis Superfines. I know glass rod and bamboo users like them too.
They are marketed as smooth casting lines that can lay a dry fly down gently and also roll-cast particularly well. That's because they have a longer, continuous forward taper in the head of the line that allows delicate, precise casts. This is not a line you'd like on a fast Sage or similar rod, but it has its place. The problem I've had with them is that they are not high-floating and the tip tends to sink, so they need to be dressed with a Gink-type floatant periodically.
Not sure what was meant by calling the Wulff lines "polarizing." I have used them for years on my Winstons and still prefer them over any others.