I preferred the original post which was flagged off the front page, since it doesn't editorialize this event into a feminist context. I don't think using words like "mansplaining" nonironically is going to increase the sympathy for this problem.
Still, an interesting high-profile event which demonstrates that a lot of people are frustrated with female contributors getting talked over.
I believe the strongest evidence that was not "bad manners as usual" is the reaction of the crowd. A genuine, spontaneous reaction of support to the "Let her speak". Obviously, the woman's description that everyone in the room was noticing the mansplaining was accurate.
Other discussion that was maybe flagged from first page - links to the Facebook post: