The info. on the 3/36 and the 5/100 powertrain is correct. As to whether it's worth it to buy an extended warranty, I know everyone will have their own opinion, but if it's any help, since 2003 we have bought 3 GMC trucks and 2 Yukons. Four of which we still own. Even up to the 100,000 mile mark, we haven't had any problems that might require the extra warranty. We have never bought the extended warranty and don't plan to in the future.
GM already makes a QUALITY products and the Camaro should be too. I feel like it's just a total waste of money. And given the fact that once you start to sign the papers on any new GM car/truck, the finance manager really starts "pouring it on" about the ext.warranty, it sends out a big red flag that this is a big money maker for the dealer.
Of course there's always a chance that "something might happen" with a first run production car but I am willing to spend that same money instead on more goodies for my new CAMARO.