Lensman - like was said Congent is only used if its the fastest route available and in the 10Mbps servers!
BTW since you are comparing yourself as RS (and ofering a better solution) can you tell us what BW providers u use for the backbone of XFR?
And if its better than this ;) :
http://www.rackshack.net/english/aboutus/networks.asp
There i can see:
Time Warner
Verio (5 gigabit links)
Allegiance (2 gigabit links)
MFN (3 GigE links)
Savis OC3
ELI D3 link...
guess what there is only 1 Cogent pipe ....so guess your teory is flawed!