MK8 was one thing. E3 was another. John Harker said Nintendo did really well on social medias, and as someone who looks a lot into twitter, I can tell you Wii U used to be mocked months ago, it's now discussed super positively: there's good word of mouth in action. The OS update making the system more satisfying to use was another thing. Better marketing with the free game promotion is also a better execution from Nintendo. What you look as insignificant things concurred to change the narrative.I don't believe you're crazy. I believe you just desperately want to see lots of significant change when very little significant change has happened.
One significant event happened in the past 60 days: Mario Kart 8 came out. The sustained effects of that game are what are interesting to me. How the Wii U is perceived in "medias and conversations" is so irrelevant I can't even express it.
There's another theory: http://www.gameskinny.com/dxuub/wii-u-surge-due-to-disappointment-over-ps4-and-xbox-one
This could lead to believe, once big games will release on Xbox One and PS4, Wii U won't stand a chance. That could happen, though I believe Wii U's audience and value prop is different enough to sustain console sales.