I'm okay with using anecdotal data to refute anecdotes. So, source: me, I've seen loads of high achievers come in, get promoted, stick around for half a year, then job hop to the next company in order to "start without baggage" but at a higher rung.

(And of course, while it should go without saying, it very much needs saying because people are very bad at logic: that doesn't mean I claimed that no high achievers stick around, and it also doesn't mean I claimed that people who do stick around are low achievers. Reading the latter would require making not just one but _two_ mistakes)