[JohnnyGMachine]

BTW, don't forget - when the Mustang was all new for 2005 - you couldn't get one, they were on back order, etc. etc. It's the same thing for the new Camaro.

In all fairness, I'll speculate why I think the Camaro is outselling the Mustang a bit...

1 - The Camaro is a 100% all new car (compared to the last year produced in 2002)
2 - The Mustang is only a refresh, if you put a 2005 and a 2010 next to each other and squint they look the same. Performance is also the same.
3 - Mustang down on power compared to the Camaro - although I still think all around the Mustang is a better, more rounded Pony car.

When the new 412hp 390 lb. ft torque 5.0 6-speed Mustang GT hits, Mustang sales will pick up a lot of steam, and the Mustang 50th Anny. is just around the corner. It's still a lightweight compared to the competition, and the interior and quality seem to shine with the Mustang. There's rumors of a Boss 302 variation for the street and it will be interesting to see if an all alloy block makes it's way into the GT500 to help it's weight out. I'm already hearing rumors that the Challenger will be done in about 2 more production years.
One of the contributing factors for the Mustang outselling the Camaro and Firebird combined 2 to 1 a few years ago was that 50% of overall Mustang sales were female buyers. The Camaro was too difficult to get in and out of, heavy doors, hard to see out of etc...sounds like some similar reviews on the new Camaro. One of the big negatives for Camaro back on the late 90s and early 2000 was the large heavy doors and, bad ergonomics, and hard to see out of? The new Camaro is Heavy, down on handling from the Mustang even with IRS and the V6 Camaro isn't looking too strong either.
2011 will be an interesting year for the Pony Car wars.