freejung - 6:32 pm on Oct 1, 2010 (gmt 0)
Who cares about a 42 or 62 Kb. image if it's just a thumb of a 16 Mb. .flv video?
Images and photos make up about 65% of the bytes transmitted per web page today.
This resulted in an average 39% reduction in file size.
So if implemented universally, this would result in about a 25% improvement in speed, on average, for the web as a whole. That's a huge win. Google has made it very clear that they consider the average speed of the web to be a critical business interest.