I would just add that knowing or studying with a principal player for whose section you are auditioning could be an advantage, but it’s not so likely to be a political one. It’s rather about gaining insight as to the benchmarks of good orchestral playing and auditioning. There are rumored cases of power-plays at auditions, but they are rare and mostly unfounded. If one does the research it will support that auditions are about as fair as they can be…
Meanwhile, there are about 50 ICSOM orchestras who've been hiring talented musicians all along, thousands of players - it's no secret...
Douglas Yeo has a lot of good articles on his website. I refer to one below which addresses the audition system and singles out some trombone players who obviously succeeded through playing prowess, not politics.
http://www.yeodoug.com/resources/sym...ons/aud04.html