There has been lots of speculation on this subject while we already should have real evidence and data from Korea, China, TW servers. I'm really curious to know how improving 25 man loot has impacted 10 man community there? Can someone from Asian servers talk about this? Are 10 man raids dwindling there?
Well I took a look myself via wowprogress and I was amazed to see this on two high populated TW, Korea realms:
There are 16, 10man guilds on top 20 list and only 4 25man guilds in first realm and 17, 10man guilds and only 3, 25man guilds on top in second realm. So maybe after all this huge 25man loot advantage doesn't hurt 10man raiding community at all.
Still looking for feedback from asian players though!