Name of your Internet Service Provider (ISP): Comcast
Ticket or reference number from your ISP: Not going to bother
State/Country: California
Date/Time: This problem occurs nightly anywhere between 4pm to 8pm pst.
Frequency: Everyday. It has been happening for about a week.
Content: Whole world
World: Excalibur

So after reviewing the forums, this seems to mainly be a Comcast problem and it starts at 4 pm pst (7 pm est). And there does not seem to be any point in contacting Comcast about this issue as most people have received a "not a problem on our end" reply. I really hope that this gets resolved soon, it really is frustrating when there is a problem that you have no control over.