Have you considered a percolation test to determine drainage capabilities? Standing water and/or silt rings on grass indicate pooling, which indicates high saturation. Developers are out to sell lots; they won't always tell you about the suitability of the lots for building purposes.
If you build with a basement on ground that stays saturated, you'll want a really REALLY good sump pump. The reason I asked about rural is if it's "undeveloped", you can look up the soil type online and find out what the properties and suitability ratings are for that soil type. I'm not sure how to do that for Wisky soils...maybe contact the DNR? That information is less useful if the developers moved all the topsoil around (or away) because they have effective changed the properties of the soils.
I may do that - thanks for the info! I'm really just wondering if there would be a wet spot in the yard during a 2008-type year.