I've been shooting with dot and scope sights exclusively for over a year. I just went shooting yesterday with my iron sighted revolver and I couldn't shoot worth a darn. One needs to keep his skills sharp with these tools or they become dull quickly. After shooting about 100 rounds from the bench, I was grouping reasonably, but not well, at 50 yards.
My reaction after so long away from iron sights is "how did I ever use these things?!? This is horrible!". Oh well, that just means that the revolver comes along in the target shooting kit from now on and gets shot at least a bit each time at the range.