WarcraftXP.com reports that after the Ghoul Frenzy bug that plagued Star.WeRRa on the Blue Rose map, DayFly suspected that there was something wrong with the map. In addition, Spirit_Moon thought that Orc was particularly strong in the Prime League maps.
This prompted DayFly to ask a programmer to unlock the protection of the Prime League maps, and when the programmer looked at "Lost Temple Prime", he found that the stats of the units were all modified in advantage for Orc and disadvantage for Night Elf.
The reason why the effects were not apparent to the players, was that they were made to things such as hit point regeneration, rotation speed of units, production speed, cooldown and range of magic. All the Night Elf units were nerfed down.
An example of such changes is that the Orc units' hit point regeneration rate was upped from 0,25 to 0,45 while the Night Elf hit point regeneration was lowered to 0,40 from 0,50 (the Night Elves only regenerate during night time). Another example is that the build time of the Great Hall was reduced to 138 from 150 seconds, while the Tree of Life build time was upped to 115 from 110 seconds.
A list of the changes that were made to the map in the third semifinals match where Romeo played FreeDom can be found in this WCReplays.com forum post.
DayFly suspected that the Prime League maps had been modified to give an advantage to Orc players and cheer up the Orc users of Warcraft because "they had been depressed all the time". On his website, he said that the Prime League maps were created by Jae-Young Jang, and that he thought the maps were modified especially for the matches after the last Winter Prime Season.
DayFly added that he feels sorry for ReX.Romeo, because Romeo always had advantages in the matches and he may think he did not finish second in the Prime League tournament because of his skill, but because of the modified map.
Original WarcraftXP.com Post