I spoke to someone at Crescendo today and sure enough the crossovers are 6db on the mids and 12db on the tweeters. Since I wasn't requested to not discuss the conversation the gist of it is that when they prototyped the sets the original crossovers were 12db on both elements but they got switched to 6db and 12db after going into production. This was done without their knowledge or consent so they're pretty much blameless in this as they were advertising what they thought they were selling based off what their OEM/ODM had agreed to supply.
Needless to say that while I'm not terribly happy about not getting what I had thought I was paying for I can't fault them because we're both in the same boat. Plus, in light of my finding this (they had no idea prior to my call) they gave me a credit towards a future purchase which I'll most likely take them up on when I decide to replace my even more tired rear stage. Although at that point I'll likely go with their Mezzo series comps, move them into the doors and put the Symphony's in my rear deck. At any rate, the upshot is that they're good guys and weren't trying to do anything shady, stuff just happens.