From Hellenismos Today by Timothy Jay Alexander (context: introduction to Hellenismos):

“Hellenic Reconstructionism allows for a great deal of diversity in beliefs and practice because of the very nature of ancient Greece.” (pg. 19).

and in the following paragraph (also pg. 19):
“Each city-state [polis] had a unique religious calendar. They had their own versions of the myths. The practices of each city-state could almost be described as separate denominations or even religions.”

See for yourself, this page available on Google Books preview (also, screen-cap taken for when he re-sets his Lulu preview permissions).

From this, we can conclude what I and others have been saying all along; indeed, it supports my theory that Hinduism is the way that polytheistic religions evolve naturally (after all, Shinto shows many parallels, albeit with a uniquely Japanese take on it), and that Hellenismos will be best served through the establishment of diverse sects and philosophies, Thiassoi to specific deities (including less popular minor deities, such as Kirke [for you modern-day Pharmakoussai]).

If this was a “one size fits all” religion, then why, when looking into the actual history, do we discover that different poleis did things differently? And if all these thirty-odd Hellenic tribes allegedly respected each-other as equally Hellenic (as one kid recently dared to alleged to me, a philoboeotian, in an e-mail), then what was the deal with Athenians regarding Boeotian Hellenes as “barbaros” (non-Hellenic speakers — after all, such chauvinisms usually come from Athenians, both past Athenians and modern Attic-focused polytheists)? There is a wealth of Hellenic diversity that should not be ignored or cast away because of the agendas of an extreme minority.