[CentOS] 'Political' Questions on CentOS please

Hi

I have used CentOS personally for 'ages' but i have some questions that i need answering from the wider audience. These are for management as i am proposing RHEL for our QA and Prd infrastructure and CentOS for dev. I would go CentOS for all areas but we need 'support' on our prd systems.

Can anyone tell me roughly how many cpu's are running centos? How widespread is it, does anyone really know? How many developers are helping with CentOS? When did CentOS 'start' and how long will it be around for? I am trying to get an accurate answer to fend off the 'well it could disappear at any minute' argument.

thanks guys