Given the second sentence of 'Microsoft should be able to state exactly what is wrong.', then they probably mean these:

https://news.ycombinator.com/item?id=33037323

https://news.ycombinator.com/item?id=33037211

And these ones showed up right after they posted:

https://news.ycombinator.com/item?id=33037364

https://news.ycombinator.com/item?id=33037349

Edit: actually that first one was after they posted too? So their comment may not have been accurate the second they made it, but three comments defending microsoft's secrecy showed up in the next five minutes.