Level3 to Savvis/CenturyLink problems?

We have an MPLS backbone from Level3 and are experiencing issues between two of our San Francisco Bay Area locations – namely our HQ in Burlingame, CA and our Savvis/CenturyLink Data Center in Santa Clara, CA. Ping response times between these 2 sites are within the normal range, but our Applications are timing out. We’ve obviously done a ton of troubleshooting on the Application side of things, but everything points back to a circuit issue and after a lot of testing we are scratching our heads trying to narrow down this issue. So I wanted to post to this list to see if anyone else has noticed issues with their Level3 circuits in the Bay Area over the last 2 days as well? Thanks for your feedback! Regards, Leah