Buffet didn't have an issue with the internet, he had an issue with the way internet companies were being valued at the time. Buffet was still valuing businesses based off of cash flows, whereas many were experimenting with valuations based off of page views or searchability, and Buffet was absolutely right that that the idiots doing the latter were off the mark.
When he said this, there really werent' internet companies with proven models like Google and Amazon. You had hundreds of Pets.com sites that had no profits whatsoever, yet were being valued at insane prices. Big difference between the current internet world and 15 years ago.