I have been a vim power user for a little over 2 years now. I never bothered installing plugins and spent all my time instead learning ... the exact same commands described in the article. Now I type fast, I mean real fast.
A couple more tips I find useful:
- 'gg' and 'G' in command mode will send you to the beginning and the ending of the file.
- 'Ctrl-N' and 'Ctrl-P' in insert mode will auto-complete (suggestions only come from existing words in opened buffers, for more you'd probably need plugins).
All the other tips are _spot on_! I especially like the first one about moving vertically one line at a time. It takes some time getting used to, but the fact that you can repeat the 'jump' or jump back to your previous position. Believe me, you'll fly :)
My new set of advice for blazing fast typing:
1. Learn to touch type. The rest is meaningless without this.
2. Repeat 'vimtutor' religiously for 10-15 days.
3. Read this post and apply every tip until it's hard-written in your fingers' muscle memory.
4. ... voila!