She went fro commander to 4 star admiral in 15 years. That tells me the promotions boards are more interested in advancing a minority than finding qualified candidates.
David Petraeus went from Lieutenant Colonel to four stars in about the same time. What minority slot was he filling?
Actually what is says is that she had a mentor some where
near the top. Promotions up through 1 star are usually dependent on performance. Above that level, whom you were or are connected with carries a lot of weight with selection boards. If I remember correctly, who ever is considered for promotion to 3 & 4 stars in any service is discussed in the White House.