It definitely draws direct parallels to net neutrality. It also shows the consolidation of web services into the hands of a few large corporations and the impact it has on the internet.

Im sure Twitter would argue that it's not throttling, they don't limit the speed in any way. But it does make it appear to end users as if the web site is loading slower.

It would be interesting if these sites could see a noticeable drop in traffic during the period Twitter was imposing delays on the redirect. If so, thats potential lost revenue and a basis for a lawsuit.