Generally speaking, consistency will always make things more accessible in lots of small ways - if people know what to expect they can find things more quickly, regardless of what technology they use, and they can if need be adapt their technology better if it can 'hook in' to predictable consistent things.

When you meet an unfamiliar web page you will expect certain things as regards the layout, the way navigation works, what types of things you can do on a page. This is an example of consistency (doing what everyone else does) helping make the web easier for everyone to use. Hence a lot of accessibility techniques are in fact just about trying to codify and implement consistency in one form or another. So it's not just about learning specific techniques, its about a whole attitude, a way of looking at the web.

Hah! Put like that it sounds all romantic and beautiful!

But if you prefer a specific example: I have an illness that can make thinking hard on occasion, when it strikes I literally cannot process the information to understand language easily. On those days, finding a familiar text link will be much easier than having to 'translate' unfamiliar links and work out what each one means.