For the last time! Rated 5 out of 5 stars
For the last time, there is no real proof that lastpass has been effectively hacked. There was just some strange traffic in their network, on other occasions they could find the source of the traffic, in this case they couldn't. Most other companies probably wouldn't even notice something like that (*cough* sony) or even worse, they might ignore it. LastPass on the other hand are paranoid, which is a good thing in this case.
And even if someone managed to get their hands on the password hashes and salt of some acounts, it wouldn't necesarily mean they could decrypt your data, which is only stored encrypted on the server. LastPass don't store your master password on the server, so they can't recover it if you lost it, but this way it also can't be stolen.
If your password was good enough (10+ characters, not in a dictionary, numbers, many special characters) there is no way anyone could bruteforce your password and decrypt your encrypted data in less than 500 years.