Nintendo: MK8 at 3.49m (retail + digital) as of end of September. Undertracked on VGC?

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Kerotan said:

sundin13 said:
Typical digital attach rates are around 10% and people tend to think that people with Nintendo consoles buy digital less...Either everyone predicting 500-600k digital didn't do the math or they think that MK8 has a pretty giant digital attach rate

270k digital would be 10% of 2.7 million.

MK8 is not a typical title. It's by far the most hype game the Wii U has had and will have. It's not unreasonable to think double the people bought it digitally compared to your average game. 

Why would more hype lead to a higher proportion of digital sales specifically?