We covered this in this thread already (it was checked and debunked by someone else.) What she said and retweeted was that she was the first Arrowverse actress to direct an episode of Flash. Not the first woman director; the first actress.
Well, frankly, because after my lengthy chat about 35 mm film shooting, I didn't want to go through five seasons of Flash directors. But also, I was addressing the comment made that DP had an easier job than the other directors, since she was familiar with Flash, and they were new to the show. I had a feeling that - like other comments made on this thread so far - that this probably wasn't true. And sure enough, one quick look at season five showed that it wasn't.
If you don't want to compare TC to DP because TC had already directed extensively before coming to Flash, then I'm really not sure where to begin with Millicent Shelton. Prior to coming to Flash, TC had directed three episodes of Ed. Prior to coming to Flash, Millicent Shelton had directed at least 70 episodes of various TV shows, including comedy and drama. Not exactly an apples to apples comparison, is it?
I've already compared DP to TC in this thread on both the technical levels and the WB publicity levels, though I realize I made one error - TC has directed three episodes of Flash, not two.
I also noted that TC directed an episode that actively sidelined Joe, Wally and Iris for Ralph. DP directed an episode about a young, mixed race girl learning that she ha superpowers.
Flash has a worldwide audience of around 10 to 20 million people, depending upon what WB is saying at any given moment. DP currently has about 713,000 followers on Twitter and 3 million followers on Instagram.
But while we're on this subject -
The CW, and the Arrowverse in particular, has an abysmal record with hiring women directors, in part because most directors are men - about 24 men to every woman. This has impacts throughout the field. To his credit, Berlanti has finally been working to address this very real problem - not just hiring women directors, but also mentoring and training women - presumably why Andi Armaganian directed an episode this season.
And what happened? The second episode from a new, woman director has been dismissed as "easier" than the work done by other directors - who until this season, have mostly been men.