D-SLR Camera's

[Ron Fox]

When you take still photo's or a photo of a slightly moving target with your 5D or 2Ti does it take a few seconds for the camera to auto focus and take the photo? I was in the store testing out the Canon and Sony camera's a few weeks ago. When I took photo's with the Canon the auto focus went back and forth for a couple of seconds trying to focus on the subject. When I took photo's with the Sony as soon as I hit the button a photo was taken. I could push the button time after time and a clear, focused photo would take every time. Is this because the Translucent Mirror Technology in the Sony?

Thanks.