Who's going to willingly use a MFDB system in low light, high ISO venues when a modern DSLR would be much more appropriate. People who buy MFDBs aren't buying them for their high ISO prowess. So to my mind the comparison is pointless.
I'd really like to have a MF DSLR that was useful at high ISOs. In fact that's the main reason why I find it difficult to pony up for one.
I hired a H339D last year for a shoot. Unfortunately the weather was particularly weird and the light levels plummeted and I had 30secs to grab shot between torrentional downpours. I had a couple of ProPhoto heads set as fill, but they ended up being the main light source and they simply weren't powerful enough for the large area in question. I had to shoot at 400ISO and underexposed a little too. Even so I think it was only just 1/125th handheld. The results were not exactly as good as I hoped for such an expensive camera.
So a MF camera that could perform well at high ISOs would be great for my needs, as with outdoor shoots, you can never guarantee light and it gives you greater versatility to boot. If the H3 had decent high ISO, I would have captured a much better shot. And the reason I choose that camera over my much better performing in low light 35mm DSLR, was that I wanted much better quality. Can't say I got it.
As for Ray, he may harp on a bit at times, but most of the irritations to do with him is the incessant ranting about him and the daft demands for censorship. If you do think he is a troll, then feeding him is the daftest response possible as he will wind you up even further. As this thread shows.
Personally, if someone is annoying , I just use the ignore filter in my brain. Works pretty well so far!