Odd ball out here.
Three dot.
I've used both and still prefer the three dots. I've used three dots since they first came out, before there were night sights, and they are so ingrained into my brain now, they are my normal sight picture, and I have to consciously look for a normal sight picture.
As far as speed and alignment, I think more of this is what your used to and practice, and what your looking for from the sights. I find I get better hits at longer distances with the three dots than I do with the other set ups.
For me, the the two dot or bar dot take longer to acquire, because my brain is trying to fix the gap between them, trying to get a proper alignment. Theres no third reference for confirmation. With the three dots, I get instant vertical and horizontal alignment with three evenly spaced dots without thinking about it.
Like I said before though, I have more time on the three dots than many are old, and they require no thought for me. Those who are accustomed to the other set ups probably dislike the three dots for the same reason I dont get along with two.
