I'm getting quite a few now. In the past few years they were only noticeable when my hair was a tiny bit longer, but now they're obvious even when it's short. Hell, even the beard has started to grey.
Those things are "people's wisdoms" that are seldom accurate. Like the classic "it always skips one generation" cliché. There's so many factors that determine your phenotype that it's impossible to pin it down to one person.