My American friend says that an overwhelming majority of the Russians he had a contact with had been really friendly. This means friendliness in conversation, willing to help (say workplace issues), opening personally (say invites to family events). Such things, as automatic plastic smiles and automatic exchanges: “How are you?” with expected “I’m fine” were not typical for regular people.
Russians are generous like Indians, Canadians, Italians. There are generous and not generous Russians.