I am sure Alexa is not the most appropriate tool to do this type of analysis. However, their results are fairly accurate when you consider ratings of top 100 websites and that too if they are in the similar domain.
I tried to compare orkut, facebook, twitter and aging myspace.com ratings for last 2 years. Here [...]

Google websites are no doubt, the most visited internet property worldwide. In Indian internet landscape too Google properties are far ahead than its nearest competitors. Now let’s have a look at what data say:
Top 10 mobile websites in India (source: opera):
1. Google: Google.com
2. Google: orkut.com
3. songs.pk
4. Yahoo: yahoo.com
5. facebook.com
6. wikipedia.org
7. Google: youtube.com
8. my.opera.com
9. peperonity.com
10. zedge.net
Top [...]