Thanks for the links Goran and Dietz; I did get an idea - if vague - of what straight passes of VI samples into MIR should sound like. It's useful to know how much more sugar I should be expected to add to the cake...
As far as the "MIR-only" demo mixes and how that could lead to "how bad VSL demos sound" comments, I prefer it when a company allows one to guess what their products sound like 'right out of the box' - something that some less effective demos here afford, rather than just flaunt 2-3 master programmers' achievements, thereby making me suspicious and curious as to what MY mix will sound like, at least initially. The instruments' demos over the years have been very informative in that regard, in that the programming skills of the many users that have been allowed to submit their tracks have been disparate enough for one to gauge both the raw, as well as the potential, qualities of the VSL.
Further, I have to tell all those people who rave about EW's, Spitfire's, and other libraries' realism over VSL's, that their repertoire gamut is exhausted somewhere between the soundtracks of Batman and Inception and the latest adolescent-vampire/sword-fought-battles trailers crap.
Find me La Mer, Pictures, and The Rite demos from other companies' products, and let's compare them to the ones here. Who knows? You maybe right, but you're not going to prove it by citing orchestral examples such as the typical generic cloned drones that (dis)grace the demo pages of most other sample libraries.
Let's have some EW Brahms! And while we're at it in terms of realism, let's throw some rival companies' chamber music offerings for good measure... (pun intended)