Hacker News Reader

That may well be a factor in what's going on, but for whatever reason, there is evidence [1] of a height-based pay gap in hiring and compensation. We're seldom aware of our subconscious biases, but they still influence our actions all the time.

[1] http://www.apa.org/monitor/julaug04/standing.aspx

I got the impression that using height was purely a rethorical move from the author referring to that when you're young you're shorter

it's not about height, it's about age