Winters, regardless of the ratings the cars ran specific times. And by pro drivers I mean pro drivers. Drivers with championships under their belts. And it is a known fact that the LS1 engines in the Corvette had different tweaks to it...whether it was a different cam profile or intake manifold, they had better engines. I mean why would Chevy put the same exact Corvette engine in a Camaro? Even now the Corvettes have slightly more hp. I ran these cars (Camaros) at the track. I saw what they can do on multiple occasions. And they were nowhere near the 12s...I ran them all day and I never broke into the 13's. Maybe with some ET streets it woulda been a different story. LS1 guys are always talking their engines up. And I have yet to see one do what people claim. Of course there are the few exceptions that get posted on YouTube...but still this is not representative of the majority of LS1s out there. Even if you found 100 videos that would still not represent the majority of them who have yet to break 13's. Heck I've seen the new SS Camaros run mid 14's. So there are some cases where a good driver has a good combo and can accomplish these feats. But chances are that your average dude in an average "bolt-on" 2001 Camaro with his baseball cap on backwards isn't doing a 12.
The camaro and C5 engine are the exact same. 241 head, same intake and exhaust valves, same timing chain, same crank pulley and oil pump, and same cam profile(except for the FRC in some cases). Again, I was there at MTI in Houston from the beginning, first LS1 in the 9's, etc. I've been there and done it.
Just to let you know a little about me, I was the 2nd person on this board that I can recall to do a PI headswap, and I was the first person in the 2v community to ever run reground cams on a 2v(erson). I helped a guy named Shannon Wheeler(fraud) when I was in high school start a site here and on many sites called DTA racing. I ran a 13.1 ET in 2000 with my 1998 GT with PI heads, at 260rwhp in full street trim with 17x9 tires all around with tokico blue shocks/struts and ford racing c-springs(street/road racing setup). I ended up doing 3 PI swaps on my 2v mustangs that I owned and raced them. Here I am in highschool right before I ran a 13.1 pass, and you can see the cars street trim on nittos. Nobody was faster on this board or the Corral without ET streets, weight reduction.
If you care to dispute my facts, then you are dead wrong. We have plenty of drivers that can hop behind the wheel of a stock LS1 and run 14's, and some of us can run low 13's bone stock. What you have seen over the years is not indicative of what these cars are capable, depending on your DA and/or driver ability.