Japanese forum posts do get quicker responses but that is due to the dev team being Japanese and it being easy for them to quickly respond personally. And they don't respond to absolutely everything either.

I believe the moderators wade through the trolling and the less serious threads looking for posts that are worth the devs time and take to them the more pressing posts and English ones need translation twice over which take additional time. It can take them a long time to respond sometimes unless you have a bug issue that a gm can respond to, they tend to be faster.

Basically you post and wish for the best.