.com vs .net vs .info and a strange question

Go to google and do these searches :

site:.com (7 billion results)
site:.net (558 million results)
site:.info (58 million results)

Here's my strange question : How does google decide what to return for these searches ?

For example, site:.com shows bmighty.com for the first, windriver.com for the second and youtube.com for the third ! Can anyone make sense of this ? Perhaps such a meaningless search throws the google engine into a brain fart and it just spits out whatever.

Anyhow, I thought it was interesting.

 

Only Google knows how and why they do most of the things it does.