This is an example of calling someone out for a misstatement that does not change the meaning of their message, and so was probably not necessary to make.
I'd bet closer to six (6), and that can probably be verified (or at least ballparked) by looking at some of their SEC and other disclosures like franchise info.
But that's just direct bosses-boss levels. Doesn't take into consideration things like... PMs, suppliers, customers, Health & Safety (which will vary by locale), unions, security, accounting, HR, public relations & the media, the board of directors, and all of the myriad depts. that will pop up in odd or varied ways.
Maybe not 100 levels, but certainly dozens and dozens of interested parties.
Really? You think there's a hundred or more executives/managers/supervisors between the CEO and someone on the floor of a SBUX? I'd bet closer to 10.