Just wanted to chime in here:
Today I did a little experimenting with dips Gironda style as described in the above posts, and I did not really like them. They felt very unnatural to me, there was a bit more focus on the lower pec but it did not feel right on my shoulders. Just felt awkward to me, but they definitely work your upper body differently.
I think I will stick with my close grip dips with elbows straight back.