I think, Marco, that it should be pointed out that it doesn't require anything close to the the 8060's maximum claimed resolution of 12,000 dpi to produce the results you post here, and that this was approximately a 2600 ppi scan. That is of course plenty for an 8x10 film. There are a number of drum scanner models that can achieve this, including the Aztek Premier you mention, and it's wrong to suggest otherwise as you do in your promotional blurb (not to mention the claim, made second-hand, that this particular practitioner makes scans of quality unique in the world).
As to the larger point of the capability of large format film, this is amply demonstrated here, and the Tim Parkin site mentioned gives parallel results. Those of us who shoot in various digital and film formats don't find these results in the least surprising. I would only add that these discussions are incomplete, centering exclusively on spatial resolution and dynamic range. However, equally important to apparent image quality is tonal resolution--the ability to separate tiny differences in tone--as this is responsible for the sense of richness in an image, which large format film so excels in. While high spatial resolution is required for high tonal resolution, it is not by itself sufficient. This is often confused with dynamic range, which only defines the extremes of useful exposure scale, but not how many steps of tone are recorded within that range. I have no technical data to confirm this, but digital camera images always look a bit deficient in this area, and I wonder if the large amounts of sharpening applied, both in the camera and later in Photoshop, to achieve adequate spatial resolution, does not force close tones together enough to obliterate fine gradations. The effect is certainly visible in high magnification, and it seems reasonable that this accounts for a certain brittle look to many digital camera images, even at normal print sizes, that I find a bit unnatural. Of course this may be a cultural effect, as I did not grow up with digital imagery...