From my usual sources for first hand information including DPreview, NO mention of auxililary flash feature or anywhere stating this so ABUNDANTLY clear.
Either you must have received priviledge information or you must have read the online manual thoroughly. For me, I am only stating what I come to realize AFTER I buy the camera and reading the manual to discover this. I hope that whoever purchasing this otherwise EXCELLENT camera would make a fully informed decision.
And oh by the way, Nikon had always pride about their backward compatibilities, go figure this one out. Now it has degenerated to not only a non-matrix flash let alone OEM entry level non-TTL flash function comparable to any $30 job.
Of course I am bitching about it cause I paid $400 for my SB28. Sorry you don't feel the same.