I think it is pretty hard to know what your ratios are with monitoring and recording sighting over a period of time. I have found on our property in Southern Iowa it also depends on the season. During the bow season our ratio is 2:1 (2 does to every buck) that is a pretty good ratio, but also took several years of intense harvesting to get it that way. During the gun season, or say from Dec 1st on the ratio goes up to 5-6:1 (5-6 does to every one buck). We attribute this to several reasons.
First being bow season is during the rut, the bucks are on their feet more during hunting hours, so we see more of them. Once gun seasons roll around our data shows the bucks becoming more nocturnal. Second, during the bow season especially once the rut starts kicking in we don't see groups of does like we do during the gun season. So, I guess that in my opinion the time of the year you are hunting makes a difference in what you are seeing, therefore what you think your ratio is depends on when you are hunting. I may be biased, but I think keeping a detailed journal is the only way to really know what you have on your property.
That is my two cents, but we have been keeping track for quite a while and when we first started recording sighting our ratio was a lot higher than we thought. I think most people would find that to be true.
Dan