I was 21 when we got our first mortgage, on that flat. I think you're right though.
Two of the nephews have done quite well, though. The one who got married last week is 28 and his wife is 25, they bought their home two years ago, I think it's on one of these first time buyer incentive schemes. The second nephew is 25, his girlfriend is about 22 and they moved into their house 18 months ago. I imagine that they're using the same scheme.
Housing in their part of Wales is pretty cheap though so I suppose it's not quite so difficult for first timers.
This one is just around the corner from my mother in law and it is a really nice estate to live on. 5 bedroom detached priced at £179,950.
http://www.rightmove.co.uk/property-for-sale/property-58827710.html