Recently, Blizzard posted an article on Battle.net that showed the adjusted win percentages of Diamond-league players in regions all around the world. The win percentages seem to very slightly across the various regions, as can be seen below:
North America – Diamond
PvT 56.5%
PvZ 47.9%
TvZ 49.1%
Korea – Diamond
PvT 48.3%
PvZ 47.4%
TvZ 50.5%
Europe – Diamond
PvT 45.3%
PvZ 51.6%
TvZ 55.0%
SEA – Diamond
PvT 54.9%
PvZ 45.0%
TvZ 46.8%
Overall, it's looking as though the PvZ matchup is the most imbalanced and could be a warning signal for an incoming Protoss buff or Zerg nerf. Note that these are adjusted win percentages, meaning Blizzard has taken various factors into account to alter the raw win percentages into numbers that are more demonstrative of race imbalances. Here is how Blizzard describes their adjusted win percentage:
What's an adjusted win percentage? Well, while the math behind calculating an adjusted win percentage is extremely complex, an adjusted win percentage can be summed up as the 'true' win percentage of a given race, produced by removing the skewing effects of the matchmaker and factoring in player skill. Combining information from millions of games being played, hundreds of thousands of players, their hidden skill rating, and a little math, we can generate reasonably accurate figures to compare how successful each race really is versus the others.
Given the current percentages, it seems that Blizzard will make slight changes to balance and nothing drastic. Time will only tell as to what the exact changes will be, but it is certain that Blizzard will be devoted to the cause of balance.
Source:
Battle.net - Win Percentages Around the World
