You're missing the point bro. If you really think that running heavier shit is going to make you go faster, I don't know what to say (unless you're ALWAYS going downhill). It's simple science. As for your friends with the Track Pros, they must feel like pieces of shit. All I'm saying is tell your boy to throw a 23 on front and a 25 or even a 28 on the back and tell me he doesn't notice a difference. Sure he might save a tube or two every couple of months, but they're only like 4 bucks.
i didnt say it makes you faster, all im saying is why would you try to get as less weight as possible and lose durability? if people can ride fast with all that weight, why not keep it? it's different if you're racing, but if you're just city riding, you dont want to have gear that would just keep breaking on you easily.