831. Netgear WNR2000 & 100mbs Cable Poor wireless download Performance

It wasn't until I upgraded my cable speed to 100mbs that I began getting strange performance issues on my Kindle. After getting a speed app, I discovered that the download speed was 3mbs. Not a typo: THREE mbs instead of a possible 60mbs! Upload was 10.77 mbs (FASTER than download). I can't tell you what in particular caused this; probably could back out changes one by one to cause it again. Likewise, on my PC, the download wireless was only 5mbs! But, I won't since all is good now. Here is what I did:

1. Foremost, I read about how TKIP & WPA slows down the WNR200 compared to straight WPA2(AES) security protocol. This is changed by signing in to Netgear Router (192.168.1.1 usually) as administrator and going to Advanced,Wireless,Setup,Wireless Setup and checking the WPA2-PSK [AES] button. This supposedly lets the the Router function as a N-mode rqther than G-mode speed.
2. #1 above alone might have been the fix, but I also read that disabling 20/40 Mhz coexistence would fix a similar problem. Go to Advanced,Wireless,Setup,Advanced Setup and uncheck the box.
3. Lastly, someone mentioned QoS setting Enable WMM must be on. Mine was already. This is under Advanced,Wireless,Setup, QoS Setup.

After making the changes and restarting Router (tried doing this with no success before any changes), My wireless download on the Kindle AND PC climbed to about 67 mbs. What a significant improvement.