Fast connection has nothing to do with this. MMOs don't need more than 10kb/s most of the time, and honestly, which connection doesn't offer that?
Unless you are referring to "low latency" as "fast".

Packet loss is the worst thing that can happen, followed by high latency. This is also the reason I cancelled my sub for now until something is done about it. My ISP told me they can't do anything, so it's up to SE. Let's see what the live letter brings.

As a 1.0 player, I'm especially disappointed the things didn't change (much). The whole talk of regional servers ended up helping only a portion of the people (namely most of the NA), while dividing the community and not offering anything in exchange for the rest of the world. As expected.