How could you be more efficient using vim ? That's something I don't understand. I always suspect vim and emacs user saying it because it makes them feel like super programmer.
Start by reading this StackOverflow answer[0] titled, "Your problem with Vim is that you don't grok vi."
Like that poster states, when you are using Vim correctly you are speaking a language as you are editing. You provide it an action and then you tell Vim what to apply the action to. This is usually either a motion command, or a text object. Combining these concepts allows you to have a level of expressiveness that non-modal editors cant easily replicate.
If you are just using Vim as you would use a non-modal editor you aren't going to see any gains. But if you embrace the "language" idea of Vim, learn to spend most of your time in command mode, and start combining actions + motions/text objects, you will start to see the real power of Vim.
