User blog comment:EmpyreanSmoke/Seraphim and "Common" Angels/@comment-24834479-20150218182859/@comment-5619706-20150221125532

Since you are the one who wants to change the status quo, it should be you who should gather evidence, not us.

Simply put, there has been several implied distinctions among "regular/ordinary angels" and their higher ups. Both in-universe (implied/mentioned within the series, existence of angel classes such as Rit Zien, Reapers, exceeding the interpretation of "only 3 angel classes") and meta information (interviews saying Zachariah was a Seraph, and Carver indicating Naomi and her intelligence angels were a different breed altogether) support the idea that seraphim are a different class.

Also, polls and majority votes could not be used as a form of consensus or to settle disputes.