Here is an article. In general it is true.
http://rbth.ru/society/2013/11/29/10_varieties_of_russian_smiles_32123.html?fb_action_ids=10152694146579237&fb_action_types=og.recommends&fb_source=other_multiline&action_object_map=%5B553538004727117%5D&action_type_map=%5B%22og.recommends%22%5D&action_ref_map=%5B%5D
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noldor_:
:)
tonni003z:
wow, nice to know