But... I also highly doubt most cloud providers are bothering to tune NIC's. They are probably just throwing KVM/Xen up on some standard hardware (whatever is c

But... I also highly doubt most cloud providers are bothering to tune NIC's. They are probably just throwing KVM/Xen up on some standard hardware (whatever is cheapest with highest memory density) and opening the machine up for access. There are going to be parts they tune as a default stack, but that far? I somehow doubt it.