Sorry guys. Seems it actually WAS too good to be true. Just got the answer from LG Nordic.
“We now have some clarity as to what has happened. Optimus G has not gotten KitKat in Estonia, it's a mistake on their part.
They've got a new version of their software and have thought it to be KitKat, which it isn't.
We don't know if/when an update for the Optimus G would become available.
Sincerely, Magnus / LG”
I am deeply disappointed in LG Estonia for not knowing their own software updates...