In your experience, does caching play the same role as some years ago? I discussed that recently with a friend, and he had the opinion that nowadays there is only a neglectible difference in download speed between cached and non-cached sites, because the overall connection quality has improved in a huge way.
I for myself do not see any differences in download speed, but I am on a 3Mbit DSL, so I probably don't notice. How big is the difference with a modem connection? Has anybody compared this recently?
I am asking because I am experimenting a bit with mod_expires and just wonder whether it really justifies the effort. From a site owner point of view. Of course, from an ISP point of view it has its merits ...
What is your experience?