http://odoe.wordpress.com/2008/04/15/speed-comparison-c-generic-c-d- generic-d/

I got this from my Google Alerts, and figured that there was something more this person was missing when he ran his tests. In the past in this news group I've seen issues with mixing compilers and other things. Since I'm not really familiar with this area I thought other people might be able to suggest possible reasons.