I just got my new iMac today and have been having issues with the wi-fi... Same settings as I used from my older Macbook (and I migrated the exact settings from Time Machine). Not only is my wi-fi much slower than normal, I also get disconnected from the network VERY frequently (it's happened as I'm writing this reply). I know its not the network because my Macbook, iPhone and Kindle all work with no issues.
Does anyone have any ideas as to why this might be happening? I could even live with the slower speeds, but the disconnects are very annoying.
Thanks!