Chrome for Android working on optimizing page rendering via SPDY proxy servers
plus.google.com
plus.google.com
Given user reports and experiences of Google DNS, it seems at least its stated aim is barely satisfied in the general case: it is often slower than local ISP servers. Similarly, sticking a proxy between a user and their destination may add more latency than it could ever save, leading me to somewhat doubt the public reason these services exist.
Of course. One has to be very naive to believe data traveling to their servers is being immediately discarded.
This reminds me of a story I saw once by Onavo, a mobile app which reduces data usage by acting as a middleman and compressing the data before it reaches the phone. The story however talked about which apps made the most revenue; and guess how they knew: http://techcrunch.com/2013/01/08/onavo-mobile-games-grossing...
The company looked at game usage among their U.S. iPhone users in November. Then they looked at the market share, or the percentage of their U.S.-based iPhone owners that use these games on a monthly basis.
I don't think the claim is being made that it's better in all cases. As I understand it, Google DNS is (positioned as) a secure, ad-free resolver, and tries to be as fast as possible. In practice if there is a better resolver - say, run by your ISP - for you to use, you should use that. But often ISP resolvers fail in one dimension or another, in which case Google DNS is available as a viable alternative.
Incidentally, to your question of what data is being collected: https://developers.google.com/speed/public-dns/privacy
> Similarly, sticking a proxy between a user and their destination may add more latency than it could ever save, leading me to somewhat doubt the public reason these services exist.
Again, in the general case that might be true. I wouldn't want to use a SPDY proxy on my desktop at home, for example, as it wouldn't be able to offer me any speedup. But it's already known that similar services can provide significant benefits on mobile - look at Opera Mini. Useful feature != beneficial for everyone.
Wonder how m25 was rolled out given how bad the fonts look and how many people it impacted.
In the end this may be inevitable but I'll stick to HTTP as long as it is feasible. These 'improvements' are a step back. More bandwidth to mobile would be an improvement, as would be a mobile infrastructure without silly caps (you know, like we had 5 years ago).