Guild Wars 2

Hello, I am just curious of the impact ping has to the game.
I am averaging 80-100ping (europe-Desolation) which is high compared to the ping i get in other games(30-60).

Is 90ping good enough to enjoy competitive pvp?
Are most of the players playing with less than 100ping or is 100ping the norm for GW2?

Hello world,
How does servers work? Can i meet up with my friend from other servers? There are several zones of each location that spawn in world bosses at the same time or is it just one zone per server(when that message to move into other continent, gives blue mushroom buff, wtf?)? How can there be people from different servers in one guild?
Currently i’m playing on Europe, Desolation.
Thanks for answers, have a good day