random crashing while zoning, higher ms, blank server select!?!

[Sampten]

I had awful issues last night and tried everything under the sun to fix them, with no luck.

As far as my ISP is concerned, I have FIOS.

I am an IT person and I cannot pinpoint the issue. The issue ONLY occurs when there are over 1100 people logged in on Blue. If I get on in the morning (EST), I never run into a problem.

I hang when zoning, I get a no server select screen, I can get to the character select screen, click on the character and log in and it hangs.

I've updated everything and anything on my end. I even flashed my router last night, flushed out DNS settings on both the local machine and at my router level.

Seeing as this ONLY happens when the population of Blue exceeds 1100, I'm absolutely positive it's an issue on their end.