Funnily enough was talking about this with dd last night.
She started walking just after 9 months and by 10.5/11 she was pure belting about! Flaming nightmare keeping her out of trouble! She's a very active kid even now - she's 17, seems incapable of sitting still (seriously getting her to sit through a 90 min film is an achievement!) goes walking, to the gym, swimming, walks to and from work every day... Unfortunately she has a disability which meant she had to give up certain activities which hit her pretty hard, even at the gym she has to stick to 'low impact' stuff.
She hated crawling/rolling she wanted up and about. Although just remembering - this is apparently common with kids with her disability as the joints hurt so being on knees/wrists not pleasant for them. But she was undiagnosed at this stage.
So not a recent walker. I'm also a former nanny, childminder, babysitter - basically I've been looking after other people's kids for over 30 years, last regular babysitting arrangement ended about 2 years ago. Children and babies vary greatly on when they hit milestones, they're a rough guideline.
Of my dn's 3 walked early 2 were late walkers (both youngest and had their older siblings WELL trained in fetching and carrying for them - could that be a factor?) dn's don't have the disability.
Dd was also an early talker but I'm a right blether so no surprise there. She was a bloody nightmare for weaning though! Refused to eat anything that wasn't heavily puréed for AGES! I remember being really worried at the time as I knew chewing helped with speech and developing facial muscles and even hearing.
Just asked mum - I'm 46 I was 10 months when I started walking. She remembers cos I did it at her sisters wedding apparently. (Other sisters 1 married before her, 1 after her wedding but before I was born - mum was pregnant with me when she got married).