I track about 200 sites in the small business / marketing / social media / tech niche and almost all of them saw about a 3+ point drop in DA all at the same time.
Rand said that Moz crawled some "weird stuff in this index" so read his comments at https://moz.com/community/q/is-everybody-seeing-da-pa-drops-after-last-moz-api-update#reply_359883
But also keep in mind that Huffington Post went nofollow in mid-November 2016 so the impact of that would have hit around this update.
Huge sites going nofollow (if you believe nofollow is a real thing) would have a domino effect. It isn't just every site that has incoming links from HuffPo - it is also all the sites that link to you that have incoming links from HuffPo or sites HuffPo links to that will impact you.
According to Roger Mozbot:
The next update is scheduled for Tuesday, Feb. 28th. You can check for updates at https://moz.com/products/api/updates
We can hope the weird stuff gets filtered out by then. We'll know if we check DAs again after that date.