Status of pet/charm exp?

[fuark]

Was looking through the forums but couldn't find anything definitive. What is the state of pet/charm exp at the moment?

Pet does 50% or more of the damage and you get 50% of the exp?
Do you still need to do 1 dmg to even get 50% of the exp, or can you just not even hit the mob and still get 50%?
Does grouping w/ someone in another zone let you get full exp? (not allowed?)

Thanks anyone that knows. Asked in game but no one seems to know, lol.