Well what I think is that this is just the speed boost that we all get. Even I get it for some minutes after geting connected. Then it stabilizes to 512 kbps. Everytime I disconnect and connect again(I am using bridge mode) I get this boost of 2mbps for few minutes. Sometimes even for half an hour. Even One full day once. As far as fooling the ISP concerns., I do not think there is any way that the speed can be increased from your end.The speed to your PC is governed by hardware devices such as packetshaper on the ISP end and impossible to hack these devices. Its just that some testing goes on at ISP end we are benifitted.