I'm not surprised at all. I have made comments to this effect during the Abu Dhabi test, specifically in relation to the wording of an article summarising the viewpoints of Paddy Lowe. Lots of glowing praise for Robert in every respect - with the notable exception of pure pace.
"How fast is Robert capable of driving?" became the elephant in the room for me, because no-one was talking about it. In ordinary circumstances, raw speed would be the be all and end all of many articles. With Robert, there are obviously other factors of interest worth addressing, but the notable silence with respect to speed led me to believe he had less chance than was being implied from the degree of media coverage.
The longer this drags on, the more it favours Sirotkin. The only reason I can fathom they'd delay any news in Kubica's favour is if there were financial implications with respect to his insurance policies.
I know there is a lot of sentiment within the forum and wider community for Robert, but if Sirotkin is simply faster (with significantly less testing time I might add), and brings more money, then the decision is an absolute no-brainer.
I get the impression a lot of us cannot accept Sirotkin may indeed be faster, which is understandable considering the circumstances.