jeremyroberts -
I totally agree with that and believe you could fool people. Also, you made a perfect point about playing/performing with real orchestras and taking that experience to samples. Also about how it is real work to get a good sound out of them but with enough labor and patience and knowledge of orchestration/performance/conducting it can be done. The amount of work and musical taste that went into the Rite of Spring performance here is incredible and made it sound extremely realistic as well as faithful to the score (not always accomplished as Stravinsky himself always pointed out) AND musically expressive. It is an incredible thing to listen to. I remember Jay Bacal told me that he was going to force himself to stop working on it because he could always do more, but had to stop sometime.
So when some guy like this aerovons comes on here and says "no way in the universe" crap like that it irritates me. I played for twenty years in symphony, opera, chamber orchestras and in many small ensembles and that was the way I learned about orchestration. I have always applied that to my sample performances. In fact, it is only with knowing intuitively from experience what is characteristic, what is difficult, what is easy, what is within a preferred range or dynamic or whatever that one can really do a good sample performance. And as pointed out by the first post here the samples are becoming astoundingly capable of realism as well as musicality.