I think this is true, hopefully someone more experienced can expand on this though as it's an interesting topic.
I think that this is how certain materials become associated under the descriptor "blends well with" on certain retail sites and in some books. When you have two EO's that share certain chemical constituents in common there is bound to be an additive effect with that particular note. Depending on which two EO's you combine there are other constituents/single notes that might enhance each other by effect, cancel each other or stimulate our olfactory senses with complexity by contrast. On the other side of the coin I think this is also where mistakes happen and a blend has too much of "this" or ends up smelling too muddy or confusing. This is why I'm currently engaged in collecting data on all of my EO's and their chemical makeup. It's not easy info to find online but with some diligence I'm able to find at least the top three or ten aroma chemicals that comprise many well known EO's. If there is a reliable reference book or web site on EO's and their aroma chemical profiles I would love to hear about it.