Hey Moosem I'm not going to jump on him/her to fast. This is at least a reasonable objective experiment.
However, Godbum, it is not necessary to wait the 5 years. It should be possible to find wood from an independently dated whore house and church. We could, for example, do a tree ring comparison on the timbers and corroborate this with the historical dates of construction of the buildings.
Since this may allow for much longer than 5 years, in fact probably centuries could be found we would have a larger degree of certainty in the result.
Now, since many things have been dated from lots of sites both close to sin and not this experiment has effectively already been done.
All you need to do is a literature search of the dating of archeological finds and see if there is any correlation of discrepancies of dates. Also I'm sure you can imagine the impact that this would have if you got something other than a null result. It would be a major wow! indeed and organizations like AIG and ICR would be all over it.
Why don't you suggest they find the very few thousand dollars it would take to conduct your experiment?
In the meantime I'm prepared to wager a fair amount of money on the outcome -- are you?