Any properly designed site... (Score 1)

Any site with more than 100Mb/sec uplink should (or does) have the capability to throttle sessions. This is not new technology. If not at the webserver level, there are many options at the infrastructure level to accomplish this (firewalls, webswitches, etc.).

DOS attacks are a real concern, considering most firewalls cannot handle 200Mb/sec of real world data. As processor technology improves (and prices drop), this will change...

Patrick