Jim,
I have tried both and found that I was able to acquire my point of aim faster with the dot, and, conversely, found myself taking longer to "aim" my shots with the fine cross hair. I find with the 45x that I have I can use the dot as a spatial reference for hold off and it helps me to shoot more quickly when the conditions are switching fast. I agree with the above posters that it really does come down to personal preference. I guess I could FORCE myself to make a special trip to the range, even though it is WAY out of my way, and I can have my father bring his weaver 36x with a dot so that you can see what you are getting...the sacrifices we make for our sport, eh!
Are you able to make it to the match this Saturday? Should be a good time and quite a bit of competition to boot...three relays guaranteed.
Mike