Many of us do not really follow Bing search traffic, so when someone posts something at WebmasterWorld, even when it is a single post, I look into it.
I checked dozens of profiles and the ones that showed real Bing organic traffic all showed a nice uptick in Bing traffic starting around the weekend, Saturday/Sunday time. I saw from 10% to 75% increases in traffic, not just week over week, but looking back a couple months.
I am not sure if Bing ran an update for sure, they never do confirm search updates with us. But my data does show improvements on the vast majority of sites that already get traffic from Bing. I did see two profiles that showed a significant drop around the same time.
Did you notice changes in your Bing organic traffic? Check your analytics.
Forum discussion at WebmasterWorld.
Update: Duane Forrester from Bing replied to me on Facebook saying "cannot confirm or deny presently."