It is not technically possible because to use the service, a web site has to change their hosting provider to Google. There are no longer any servers outside Google hosting the content, if I understand the bit about DNS change correctly.

I believe you still run your own servers and Google will fetch your content from them and distribute it through its CDN.

Why would you want to?

Some users are uncomfortable with the idea that even if they avoid Google entirely by not using their search, OS, email, or maps, that Google can still have a profile of them and which sites they visit.

If you don't like the company and want to avoid them, you will now have to choose to not visit websites served through their DNS. That's much more difficult than just using a different email provider.

If one wants to avoid Google, they also need to make sure anyone they e-mail isn't using GAFYD. How many anti-Google folks do that?

When Eric Schmidt allows me to search through his wallet and home, he can collect the web pages I browse and the cookies, sessions and httpauth data attached to them.

How about you just don't go to websites that use this? That's like me saying I hate Level 3 and I never want my web traffic to go through them, is there a way I can make sure my data packets never peer with a Level 3 connection?

You should worry more about your ISP than Google trying to make the web faster.