It's what you make of it. Being buried in a textbook doesn't make you a more appealing candidate during the recruitment process unless you are well rounded and presentable. Obviously the larger the firm the better, but any cadetship can give you that edge when telling your story.
Accounting is the language of finance. You can get up to scratch from in house training, but its better to have a more solid foundation. Of course finance as a major is relevant for working in finance. Also I'd say that moving from investment banking to HF auditing is strange.