I have an interesting problem I haven't been able to figure out. Recently my home was upgraded to 100Mbps/5Mbps internet. In my home office, I have 3 systems that are wired, either to an gigabit ethernet switch or directly to the cable modem/gateway (a Netgear CG3000D). My 2 Windows laptops are getting the 100Mbps downloads as advertised on the tin. My 6 month old iMac, running 10.7.2, seems to have about 1/2 the download speed (about 50Mbps). Very, very odd. Does anyone have any ideas as to why this would happen?