no, it's not EU and USA, but a it is a very nice step forward !!!!We're pleased to announce StarCraft II region linking, an exciting upcoming change that will connect a number of StarCraft II communities around the world for multiplayer matchmaking and communication purposes. In conjunction with the start of Season 3, we’ll be linking the European and Russian StarCraft II communities together; North America and Latin America will also be linked together, as will Korea and Taiwan.
also some updates to the PTR 1.3.5. http://us.battle.net/sc2/en/blog/2983578
most important change:
should result in better framerateSeveral performance and memory improvements have been made.