For a quick introduction to empirical reality I would recommend Hal Draper, "The Myth of Lenin's 'Concept of the Party': Or What They Did to _What Is To Be Done_," _Historical Materialism_ 4. Or, there is an even simpler route. Instead of deducing what someone _must_ believe, read what they say instead. No one on this list as far as I know has ever argued for democratic centralism.
Hint: Lenin believed, and says so over and over again, that spontaneous political action by the masses is a precondition of revolution. Of course necessary conditions are not sufficient conditions.
Carrol