To preface, I've taken 2 years of JKD (the style Lee founded), 5 years of BJJ, and smatterings of JSD, Kenpo, and MT. Just to get the inevitable "you don't know what you're talking about" out of the way.
Lee was a fantastic martial artist & athlete, but he's not the god people make him out to be. Put him up against someone like Rickson Gracie in his prime in a best out of five and Lee would come out on the bottom (literally). Norris against Lee in a real fight when they were both in their primes would probably be close, I'd give the edge to Lee as he was quite a bit quicker. Lee was extraordinarily strong & fast for his size, but so are plenty of other top martial artists, boxers, etc. I wouldn't say he's the best pound for pound fighter who's ever lived, I probably wouldn't even have him in my top 10.
That page of "feats" is nothing extraordinary, it's made to impress people who don't have a good idea what top fighters can do. The hand speed is fast, but no faster than a good welterweight boxer. Roy Jones Jr. in his prime could hit a bag 6-7 times in a second, and he's by far not the quickest boxer out there. The pushups are impressive no doubt, but I've personally witnessed people I've trained with do similar feats of strength. The exploding bag is ********, it's been debunked by various people who studied under Lee. It happened a few times on VERY worn down bags.
Once again, he was a fantastic martial artist & a good man from everything I've read. He is not a kung-fu god who can shoot laser beams from his eyes and destroy anyone in his path.