Who is your ISP, and how far from the exchange are you?
I recently changed back to 8,000/384 from 20,000/1000. Was a bummer, I was syncing at just over 22meg down and the full 1meg up. But since being on ADSL2, the Reach plans are too expensive, I had to cut back. My Cisco modem wasn't using the full 22meg anyway.