I can understand the frustration,it is annoying when a question cannot be answered.I think it is a case of Oleg himself doesn't know.
He is damned if he does and damned if he doesn't really.If he states a time and it doesn't happen well he will be slagged off and he also then puts himself under more pressure and may release something incomplete that for an extra 3 months could be so much better.
Enjoy the journey,sometimes it' s better than the destination.
IF Oleg does give a release date i hope it is really ready and bug free and fully working before the announcement is made.