firstly speed, your internet connection is going to be less then 20mbs (at the very very fastest!) so it's still much slower than a 100mbs LAN connection so getting a faster connection between the hub and the computer will not make your internet faster. Also the home hub 2 only does n spec wireless up to 130mbs so even if you got full speed wireless (unlikely) its hardly any faster.
Plugging you hub direct into the master socket may give you a marginally faster internet connection, but probably not a lot, if at all.
If your connection is stable and doesn't drop out at all how it's setup at the moment I would leave as it is.