Cisco Firewall :: 5510 QoS Policing Giving More Bandwidth

I'm working in my lab trying to do proof of concept for traffic policing on the ASA 5510 running 8.0(4).  I have two laptops running Ubuntu one on the outside and one on the inside.  Both laptops have 100Mbps interfaces.  My tests consists of downloading a file from one laptop using HTTP.  Without any QoS I can see speeds close to 100Mbps which I would expect.  On a side note, try using XP and you won't come close to those speeds.  Anyhow,  I implement policing using the config below and expect to see the max rate on the laptops during the transfer max out close to the CIR.  However, I see speeds much higher on the laptops.
 
When I set the CIR to 10000 bps with bc at 1500 bytes I get speeds that range from 300Kbps to 700Kbps.  I would expect to see speeds max out at the CIR which would be 10Kbps.I'm having a hard time understanding why my numbers don't match.