Personally I use youtube the most to find out about new synths, it's fun and inspiring watching others tweaking synths and often you learn new "tricks" a synth can do or certain things it's especially good at.I'm somehow surprised by the overall positive feedback. I was expecting many, many comparisons that are conducted to romanticise analogue gear.
I'm still on the fence about posting examples from the synths we've modelled, because it would be fairly easy for us to make them sound bad compared to Diva (and vice versa).
You could debate the youtube quality but for me a good soundsource survives almost anything.
I think what FXpansion did with DCAM on youtube was great, especially the Strobe video where he has a bassline going with a beat and he pretty much goes through all the most useful knobs on the synth in a musical context, you get a very quick and honest presentation of what the synth is capable of.
Demo songs are inspiring too.
Whatever you do you would have to work pretty hard for Diva to fail.
I can live with the CPU usage even though I'm on an old laptop, I can render etc.
The only downside to me is that when you sit down with this instrument it sounds so good you want it to be able to do everything under the sun.
(I like the crispyness a lot and I'm glad the "muffled" parameter isn't on by default.)
In the meantime I'm offering to you my "rendering farm" which is actually a 400€ laptop. It can run several instances of Diva in Divine mode. 
For sure I'm not talking about full handed chords here. On the other hand the Diva CPU usage is not linearly predictable. Some modules used and some functions activated and CPU is way different.