Lexur - 7:17 am on Oct 2, 2010 (gmt 0)

people with smartphones and the monthly data limits they come with will benefit from this

Are the same numbers. A 40% reduction off the image page weight means you can save, let's say, 100 Kb if you only browse heavy/non optimized websites (almost nothing in common/optimized/text oriented websites).

I.e. I downloaded just now the ABC news page and it gave me
- 129 Kbs in HTML
- 237 Kbs in images
- 477 Kbs in javascript files
- 283 Kbs in CSS files

Internet Explorer doesn't download the three Flash ads in the website but I suspect them together weight more than 1 Mb.
And, finally, most links above the fold drive to pages with video news.