Did decent VTT's actually exist when 4e was released?

[Beoric]

Basically, that's what the "at-will", "encounter", and "daily" distinction is.

At-wills have a 1 round cooldown; you can use it again on the next round.
Encounter powers have a short rest cooldown.
Daily powers have a long rest cooldown.

It's not MMO-style "Three seconds", but "cooldowns" works as far as nomenclature goes.

Don't forget rechargeable powers for monsters, and powers like Healing Word that could be used multiple times in an encounter, but no more than once per round (true at-wills don't usually have a cooldown, you can use them twice in a round if the power is a a minor or you blow an action point).