I'm tired explaining this. If you own the whole line, I believe 384kbps is sufficient for online gaming.

I experienced
Streamyx 512kbps, 200 - 300ms w/o tunneling
Streamyx 4mbps, 200 - 300ms w/o tunneling, 500-700 with youtube running, 1k with PPS / torrent running (whenever PPS / torrent, it is not playable)
Digi 3G broadband tethered from my phone, 250 - 350ms w/o tunneling

I plug 3G when my housemate / gf is running high bandwidth streaming.
I've also tried tunnel and w/o tunnel, both give me same result. Theoretically tunneling should give better latency but practically in my situation, same result.
I'm going to try Unifi so that the bandwidth is sufficient to run PPS + Torrent + WoW simultenously, however will keep 3G as backup in case Unifi fails me.

I've also been told to config the router to make WoW top priority of all connections, have not try it yet.

I stay in Setia Alam.