Oh maybe you are a good hacker or a creator of that kind of application so you can make it fast.
That is my experience to the bruteforce that I got and it is an android application.
Maybe that app is the BULLSHIT! but not me.
Oh! and I am sorry I am not a hacker.
Doesn't matter if it's a good or bad hacker, it is bullshit. Brute-force methods are ineffective as soon as you pass a certain number of characters (usually very low) and use a combination of letters [A, z], numbers and symbols. It doesn't matter if you throw all the computers of the world are the problem, you will most likely not be able to crack it in a reasonable amount of time. Don't spread nonsense.
I agree on "Don't turn off the email notifications of your wallets".
Step 1) Don't use web wallets in the first place.