|Stuart is correct. |
Also, the LAN ports on that N router are also likely to be 100 Mbps too so while your wireless client may connect to the router itself at 100 Mbps or slightly higher (I doubt you'll see 300 Mbps) it will still only be communicating with other LAN devices at 100 Mbps.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.