You guys don't get BlueMotionTech yet?
I'm confused on this point, honestly. I think we do, but they don't seem to use that branding here much. With the Jetta just as an example of a current TDI VW in the US, it gets 30MPG / 42MPG (I believe this is 7.8 l/100km city and 5.6 l/100km highway profile). I believe this is with lackluster mid-speed acceleration, albeit lots of low-end torque (like around 8.5 seconds to 60MPH / 100kmh, but I could be wrong about this -- I'm not sure if this statistic is better on the A3?).
My point is simply that, first, diesel costs about 20% extra vs. at least standard gasoline in my part of the US. If I factor in the additional cost of the diesel, and I compare to something that's non-luxury but fun to drive (say the Mazda3 SkyActiv that's coming to the market) and gets a typical around 40mpg on highway, from a cost standpoint, the diesel is
more expensive, as well as not clearly being a big environmental win over using less gasoline.
On the positive side, VW diesels have a pretty good reputation of racking solid real-world fuel economy, whereas some other vehicles do well on a test cycle and poorly in the real world.
I like Volkswagen/Audi, and I like diesel, I had just been hoping that the newest editions on the new platform would get something more like >50mpg highway. I also think it's not unreasonable to ask that their gas engines get up to the 40mpg highway that has become standard in the size class for non-luxe vehicles (I think VW offers all this, just not in American variants of the vehicles). All I mean is that I would pay for this kind of thing, but the availability of fun to drive cars with really good environmental performance is very limited in the US. If Mazda's eco tech doesn't ruin their driving experience, they'll offer fun to drive + eco, but they don't offer luxe. It's hard to get all three at this point here.
Anwways, this is way-OT. What I'm encouraged about is that a number of the Euro marques have been putting incremental gains into their American fleet. BMW's mileage numbers have gotten better, even if they're still not really dedicating their technology to accomplishing this, and some of their vehicles (1-series) in the US have shockingly bad economy considering their size and weight.
EDIT: I saw your update -- yeah, those kinds of options pretty much get nixed all the time, in the US, AFAIK, because the acceleration profile is deemed unacceptable to US buyers.