Google announced they are testing reworking your web pages to load faster on slow mobile connections in a field test in Indonesia.
In short, they are stripping down your web pages and giving slow connected users a way to see your web page on a Google URL (like a cached version) without all the heavy images and files.
You can test it on your mobile device by going to http://icl.googleusercontent.com/?lite_url=https://www.seroundtable.com.
I snapped a picture of Search Engine Land with it:
Not so pretty but I guess better than waiting for it to load for several minutes.
Google shared some stats on the speed improvements for those on 2G connections:
You can opt out by adding to your HTTP header “Cache-Control: no-transform”.
I think you should opt out if this goes live.
Forum discussion at Google+.