But, anyway, the fact is that people are now starting to tell their own personal stories in a bid to reduce stigma and discrimination, and it is clear that the "1 in 4" term can be useful in helping this process along a little. Just yesterday on the Time to Change Wales blog several of our Welsh Assembly Ministers wrote about their own experiences.
Llyr Huws Gruffydd AM said: "Nearly ten years ago I had been diagnosed as suffering from depression. Standing in a room crying for no apparent reason isn’t something a 30 year old bloke would usually admit to – but that is where I found myself at that time."
He and other Assembly Ministers Eluned Parrott, David Melding and Ken Skates then spoke in the Welsh Assembly chamber in a debate about stigma and discrimination.
You can find out more and watch the video of the debate on the BBC website here.