Development of the 6th Gen started years ago with the new Alpha (Caddy ATS) platform. The ATS-V will be released late next year. The new CTS will be released soon. Call it concurrent development of the 6th Gen.
The ZETA based Camaro was in Chevy showrooms less than three years after Holden released the Commodore even though the company was facing severe challenges. The ATS was released a few months ago. Using the same three year cycle that puts a 6th Gen in Chevy showrooms in 2016.
GM's a much stronger and more nimble company than it was in 2008. I think you are looking at a shorter cycle with the release of the 6th Gen
