Yes, timing is essential in Nxt. Luckily it's not a big problem to have the time synced.
Agreed - but it would be better if we didn't need to rely upon NNTP servers to do this (perhaps some future tech will make them obsolete?).
If someone decide to compromise clock servers, it'll affect whole economy and beat attacker back definetely. I don't heard about attacks like that. Nxt also relays on Internet connection
