I can certainly confirm this is true. I have all of EastWest Composer Cloud Plus (Mostly the Hollywood Orchestra) loaded into my 11 tab (instance template on my PC slave. I have it set up so that a speciified CC will disable my tracks using an iPad App. This means I can load the entire server template disabed and then simply switch on instruments as I want to. In Logic Pro X, if I tap my assigned disable button on a track folder, it will disable all the instances of PLAY that I have in that tab also, or I can do it per-track for each instrument.
I do the same on my Kontakt Server Template on my Mac Pro. This has saved me huge resources and large amounts of RAM on both machines. Something that is certianly worth learning and mastering :)
I have been tinkering with VE PRO for about 3 years now and I have no regrets of my purchase. It is incredibly versatile and a welcome addition to any composers/sound designers/writers arsenal :)
I work in IT as well, so the system really is something that fascinates me.