It seems that your case is a different issue than mine.
I wish I have just lag spikes. Although it is annoying it does not disconnect you from the game, which is my case since I have huge amount of package loss.
I think that I've confirmed my problem these days. Everyday that I use my internet between 4 PM until 7 PM is great after that the package loss starts to happen.
As Gdkitty it could be a localized issue around my area, Although Roger's support told me there was no issues around my area at all.
What I am going to do tonight:
Use a proxy and force my tracert goes to different hops...
I will let you know guys if that works.