Listen again, he gave an answer directly pertaining to Dash.
He said DGbB is an interesting idea but he's not sure whether it could be applied to the much larger network of Bitcoin due to the various interests at play there. In short: "I don't know". And that's just him being honest. Dash is tiny compared to Bitcoin, there's no way of determining the effects of DGbB on BTC.

Nonetheless I think the irrefutable success of the Blockchain governance experiment has representative value and the results can be used to extrapolate an estimation of the impact on the Bitcoin eco-system. Not that we have to do that, just saying that scientists now have enough data to do so. Dash will grow on its own and we will see the effects in our own ecosystem anyway.