Our paper was published in Cell today:
A paper using different methods just went up on the bioRxiv which concludes that there is no evidence that D614G has any selective advantage in the population.
I think it is good to read about both methods to understand why they come to different conclusions. Both our web site and the web site for the other method are online now:
We also published this perspective today
Making sense of mutation: what D614G means for the COVID-19 pandemic remains unclear