Can I know something? During my week in Kiev is it possible that I was 99% of the times hearing people of all ages and backgrounds JUST speaking russian?
Sometimes we have what is called "selective hearing "

))
In fact Vera it is possible that I got fooled into thinking I was listening russian and it was ukrainian. And that my hear was subconciously selecting russian.
Personally the expats i met in there (they told me they make business in russian independently of where they head for within Ukraine), the people i talked to by chance, the bars/clubs I have visited, the phone calls I had (in which I was asking better in english or russian?), the info i asked on the streets, the friends i have met through CouchSurfing, were all ABOUT speaking russian.
This does not mean they could not speak ukrainian or that they would not have preferred to speak ukrainian.
Anyway there is nothing shocking in my declaration, even in cities like Tallinn where russian speakers are just 40%, you would only hear russian on the street. probably because estonian do not talk much:-), i mean russians and italians are always hearable!