Bill, the VR-09 engine is being referred to as "supernatural" which, in Roland-speak, basically means it's a modelled instrument. To what extent it's modelled I don't know.. the tones could be sampled, and then everything else beyond that is modelled (such as C/V, percussion, leakage/crosstalk etc).. but it's definately a modelling engine.
I think only the organ is designated as "SuperNatural" in the VR09. If the "VA" Bill W is inquiring about refers to the synth section, those are just PCM's, but you can layer 3 PCM's on the upper part and 3 on a lower to make some phenomenally enormous synth noise. Each PCM has its own set of filters, LFO's, tunings, wave shapers, and the like...really fun and easy with the iPad.
Thanks guys...so it's basically just a good old Roland PCM synth. I'll grab the documents to see what's in the waveform list.