Thank you for your response. I haven't actually heard any complaints about promotion. Most of the noise I've heard has to do with firing, namely that less-tenured managers feel pressure to get rid of a higher percentage of their team members than managers that have a lot of years and political capital built-up in the company.

However I suppose that it stands to reason that perhaps that phenomena is due to the fact that greener managers may have greener engineers working under them who are perhaps more prone to mistakes or may not be a good fit.