If the guy saif that he does have 100 mbps access, then he might, but I doubt it.
Often when people check their connection speed and find it to be 100 mbps, they actually checked their LAN speed. The LAN is connected to the rest of the Internet through a router. Everything on the local side fo the router will be fast, but the WAN (Internet) side will have the true speed fo the connection.
I have 512 kbps Internet. My OS doesnt know that.