I can appreciate and understand what he's doing. Some companies use the seizure warning at the front of the manual as a free pass to have no limit on the colors flashing all over games. Some developers do go through a seizure test. Not all do.
Coincidentally enough, I had a seizure when I played the first Spyro, followed by excessive vomiting and a migraine that lasted me three days. It only took a few minutes for it to happen. Most of the reason was the pretty colors, some of it had to do with the controls and camera. I have a feeling that the people that made the Spyro games (or at least the original series, since I haven't had any problems with the "Legend of Spyro" series) probably haven't improved and didn't do the seizure test, that they hid behind the seizure label instead.
The fact that the old Spyro games were targeted doesn't surprise me whatsoever. And if they become a base, an example, that developers should take the seizure thing slightly more seriously, I think that's a good thing.
On another topic, doesn't this article remind anyone of the one Pokemon episode that sent tons of kids on the land of the rising sun into seizures? Good times.