I work in the loop, and also have been having data issues.  While I wasn't able to really figure out what the problem was, I had this app on my iPhone that showed me network info, specifically which DNS servers I was using.  And whenever I noticed I didn't have data a service, if I checked the app, it said I didn't have any DNS servers listed.  

Either way, as of yesterday, Monday, 1/30, data speeds/connections have been flying.  It's like a switch was flipped or something.  Even here at work on the 25th floor, I'm getting decent reception and 3G service.