@magicalclick: Can you offer some context? Links, sources, etc?

 EDIT:

Ok, I see what you're talking about:

http://www.theverge.com/2012/10/3/3449912/nokia-xpress-lumia-browser-app-windows-phone

I think HTTP compression is pretty much standard these days, but this is a much more agressive model. It's probably got something similar to Amazon's Silk behind it, so it's much more than a client-side technology.