I don't know the answer to your question, but I noticed some squirrelly behavior on the business trip I just returned from. We have a shared Verizon 3G modem here in the office that people take on trips. Web surfing seemed normal, but when I tried to use a remote desktop connection back in to the office or transfer large files, the connection would slow way down, or even "seize up" completely for ~30 seconds at a time.
Definitely seemed like they were doing some sort of throttling to me...
The years just pass like trains. I wave, but they don't slow down.
-- Steven Wilson