What difference would 100 mbps make if the host only has 10mbps lines running to it? I'm not trying to say that this is the case here, but there are times when it doesn't make much of a difference. It would be a bigger difference if they were running it at full vs half duplex. To me, what matters is the hosts connectivity to the internet more than what their internal network runs at. If they have a 3mbps connection to the internet, does a 100mbps network really do anything? No, not really. All it'll do is get the traffic to the bottleneck that much faster.