Does T-Moblie Throttle specific file types?

[Sphagnum]

My Nexus S was blazing fast on the T-mobile network when I first got it, at least compared to my Sprint Moment. And for the most part, it still is, but lately I've been having trouble getting my podcasts to download with any speed at all. It takes like 45 minutes to download a 17mb file. I've tried both Google Listen and BeyondPod, both seem to have the problem (from various podcast sources btw).

Downloaded speedtest and get ~1100 kbps up AND down. My network says "Cell" which I'm not sure is right...

Any ideas? Anyone else noticed slow speeds on particular files/sites/etc or is this even possible?

 

[FreakyLocz14]

They bump you down to EDGE after 5 GB. This isn't automatic. They choose when to throttle.

 

[Sphagnum]

I havent passed 5gb yet. And like I said, I'm still on 3G for everything other than podcast downloads.....