It is quite easy to find out whether or not a given consulate is likely to issue a multi-entry visa. However a multi-entry visa could in theory be issued for a small duration of time (such as a month), which would make its advantage void for most practical purposes.
Does the EU publish any statistics on which consulate is more likely to issue a long term (6+ months validity) C visa? With that information in hand, one could choose a Schengen country to visit for seasonal vacations.
Russian media publish extensivestatistics on this topic, based on polling of people who applied the visa.
However, this will vary per country of issue and even per consulate in a country (such as Finland consulate in St. Petersburg giving long visas much more eagerly than one in Moscow, on account of border proximity).
Looks like this will vary based on many factors. Citizenship, place of application, passport validity, country applied to. Mine issued by Austria was 14 days long and one issued by Denmark was 21 days long. Both tourist visas, former issued in the US and latter in Canada.