Since the overall Audi sales also significantly improved (by 21% to 21,618), the e-tron's share was 3.0%.
We suppose that December also might be a strong month for the e-tron because of the quicker availability of $7,500 federal tax credit in the last months of a year.
Audi e-tron sales in U.S. - November 2019
Since April, Audi delivered 4,623 e-tron.
We assume that upcoming upgrades, like higher range and then also new versions, should allow Audi to exceed 1,000 sales per month, at least.