I'm not sure I completely agree with this. To me, euphony means colored, which is mutually exclusive with neutrality. Now, if you meant that neutrality and pleasantness or sweetness (which is the technical definition of euphony) are not mutually exclusive, I have to admit that I'd not be able to argue with you. But when we talk about euphonic colorations introduced by our gear (and I completely agree with the precept that all gear colors the sound somewhat), that's what I usually interpret us to be talking about when we talk about euphony.
Oh, and WRT "dry" -- I come from the studio world, where "wet" means lots of reverb, and "dry" means no reverb, so when I say that particular equipment is "dry", it usually means I hear very little smearing of the signal. Not at all the way most people understand me, unfortunately.