That's your opinion - not mine. I've seen no evidence in the posters or PR that indicates they weren't feeling the effects of A2-73. I believe that's yet to be determined. However I do believe there was a significant short attack that created the drop. There were a lot of discussions about the massive increase in short interest leading up to the day of the conference. Sadly, we should have seen it coming.
And let's not forget this is the SECOND time they've done this to us. I don't recall seeing those stories prior to last November.