Recent Issues With Packet Loss and High Latency in Bellevue, WA

I have been in this office building for about 3 months, circuit has been rock solid (we are on the 50/10 plan).  Starting on Tuesday I noticed our internet to be "stalling", noticed that around the mid morning our pings were all over the place to verious sites in various locations, would bounce from 30-2000ms.  I called in a trouble ticket and upon rebooting my cable modem it got stuck because of some bad firmware or something so after fixing that for an hour the tech didnt know why I was getting issues.  I know it's not my router as I get the same issues when directly plugged into the comcast modem. (We are a mid sized company we run Meraki Routers) I also know it's not the meraki because if i use the backup t1 we have connected to it it's fine.   Our service address is 11811 NE 1st Street.  Is there anything going on in my area since 6-3-13?

Thanks in advance.

Did two speed tests and my upload is fine here are the links.  And no my links are not saturated at the time, these were done with no other users using the line.

http://stage.results.speedtest.comcast.net/result/264083402.png

http://stage.results.speedtest.comcast.net/result/264084212.png