I didn't just post acceleration runs. There was a figure 8 time in there, too.
As well, I wouldn't call that video you posted a stellar example to judge a vehicles ability by. Top Gear, with their single professional driver, the Stig, providing the lap times is better (though not best) to use. The RX8 they tested had an identical time to an M3 and a 350Z on their course. If you took away the other vehicles and left the S2000 and RX8 battle it out, there wouldn't such a difference as shown in the vid you posted. The RX8's main downfall is its poorer power to weight ration compared to the S2000, but it reaches peak torque at much lower RPMs than the S2000. The RX8 is renown for its handling and perfect weight distribution. Remove the weight difference from these two vehicles being designed for separate purposes and you may see a different vehicle come out on top.
Regardless, I love both the S2000 and RX8, but calling the latter overrated in a comparison like this is just silly. As I said, one's a two seat roadster that starts at $35k and the other is a four door, four seat sports coupe that starts at $27k. For $8k, you could easily modify the RX8 to outdo an S2000 at everything... And still have an uncompromising car.