You probably need about 384 up and 384 down. That's the whole idea of RDP. You use hardly any bandwidth. You aren't sending any data over the Internet. You are using your keyboard and mouse to control the screen. Why would you need that much down and up?
Not saying I wouldn't get at least 1Mb down and up but only for using the Internet and downloading actual data.
Why not get the info from the guy who developed the remote desktop protocol from Microsoft.
http://blogs.msdn.com/b/rds/archive/2009/03/03/top-10-rdp-protocol-misconceptions-part-1.aspxAs he says, you can measure the bandwidth needed in Kbs. That's far from 17 Mbs. I think the A team may not be the right people to do this. Use Google yellow pages, find a company with MCITP and Microsoft MVP who specialize in networking. Generally, when these types of IT people do a job, they will get paid to look over your entire setup, sometimes with 10 to 30,000 dollar fluke meters to check every connection. But, it isn't the RDP that is causing the issue.
Once again, are you using a TS?