Won't the results still appear in Google because of the copyright text in the footer?
Here's my website results:
Attachment 95722
Here's a relevant discussion on it:
http://www.vbseo.com/f28/how-remove-...e-titles-4677/
Both viewpoints are posted there, but the end agreement is that it's best to remove it.
Of course I guess it depends who your clients/target audience are. If they're tech-savvy people who refuse to use a forum unless it's based on vBulletin, then absolutely keep it, it would be silly not to!
But for 99.9% of people they won't care. When I search for something, I don't care what software is used to run it. I'd pick a 10,000 post forum run by **shudder** phpBB over a 300 post vBulletin forum anyday. It's about the content and quality of content rather than whether it's run by vBulletin, phpBB, IBP, Wordpress, blogger, or whatever software package.
If I was building a blog, I would not put "Powered by Wordpress" in my title. I would think "why should I give up half my Title just to promote some software that 99% of my members don't give a damn about? That should go in the footer".