Most visited Nigerian websites - Alexa Vs. Google Adplanner

Alright we know about the Alexa ranking system and how it ranks websites worldwide based on the amount of traffic it pulls, but what do we know about Google Adplanner or more properly Doubleclick Ad planner by Google.
Google's Ad planner is an online tool that offers potential advertisers access to information about websites and its various categories so as to help them make the best advertising decisions.

DoubleClick Ad Planner combines information from a variety of sources including anonymized, aggregated Google Toolbar data from users who have opted in to enhanced features, publisher opt-in anonymous Google Analytics data, opt-in external consumer panel data, and other third-party market research. The data is aggregated over millions of users and powered by computer algorithms.

I decided to do an analysis of most visited Nigerian websites based on Alexa as well as based on Google Ad Planner. For Alexa, there is a list of popular websites for Nigerians here: http://www.alexa.com/topsites/countries/NG
For Doubleclick ad planner, I just used the Alexa top Nigerian websites and checked their records at https://www.google.com/adplanner/site_profile?s=domain.name&c=001
Just insert the requested domain name in the "domain.name" above and you would see how much Ad Planner analyzes it

So here are the Top Ten Most visited Nigerian websites

According to Alexa

1. Nairaland.com
2. Punchng.com
3. Vanguardngr.com
4. Sunnewsonline.com
5. Nigerianbestforum.com
6. Gtbank.com
7. 234Next.com
8. Naijahotjobs.com
9. NNPC.com
10. tribune.com.ng

According to Google's Doubleclick Ad Planner

Based on unique visitors
1. Nairaland.com 520,000
2. Sunnewsonline.com 200,000
3. Punchng.com 180,000
4. tribune.com.ng 150,000
5. 234Next.com 120,000
6. Nigerianbestforum.com 110,000
7. Naijahotjobs.com 84,000
8. Gtbank.com 64,000
9. Vanguardngr.com 15,000
10. NNPCGroup.com 7,700

Final Comments:
With the exception of nnpcgroup.com, gtbank.com, the other eight websites offer online advertising promoted by Google and so I would think Google would be in a much better position to give a better ranking than Alexa which can be biased based on the Alexa toolbar.

Also since all these sites have the bulk of their traffic coming from Google, this ad planner tool is a much effective way to track the most visited Nigerian web traffic given that it uses Google search traffic as a criteria for ranking them.

Unique traffic refers to the uniqueness of web visitors to a web site and minimizes repeat traffic which could be from the same ip.

So I think comparing the two ranking systems, Google's Ad planner list gives a more efficient report and it shows that websites like Nairaland remain on top with Sunnewsonline topping over Punch bases on unique visits.
So in all, it shows that Nigerian forums and newspapers still carry the bulk of internet traffic coming from Nigeria