1) There are still a lot of dial up users out there.
"While the percentage of Americans who say they use the internet has continued to fluctuate slightly, our latest survey, fielded February 15 – April 6, 2006 shows that fully 73% of respondents (about 147 million adults) are internet users, up from 66% (about 133 million adults) in our January 2005 survey. And the share of Americans who have broadband connections at home has now reached 42% (about 84 million), up from 29% (about 59 million) in January 2005."
The percentages are not consistent with the numbers, but if somewhere around half the internet users are still using dial-up, that's a bunch of people.
It does not matter now that they are still image files of 40 -50 k rather than 4 or 5 k for thumbnails with the high speed connection.
I was not questioning using thumbnails. I question creating thumbnails "on the fly" or at the time of viewing. It makes more sense to create and save them in advance, because they only add a small percentage more disk space compared with the larger versions. Creating them on the fly can slow down everyone, broadband or dial-up, while the cpu cranks, every time the page is viewed.
I "hate" html resizing, and my nose flute shrieks when I notice it.