If you have the amount of acreage where you feel you can pass on 140 class animals, wait until they grow up, and instead spend the majority of your hunting season pursuing true mature bucks, say 5.5 and 6.5 year old bucks you know are available in your area...if you are good enough.....why not wait?
On some property in the country a 2.5 year old 8-point is the true trophy for the neighborhood, and even more rare than some areas that hold several 3.5 year old 120-130 class animals. In some areas it is harder to come by a 2.5 year old 8-point, scoring 90-100, than it is to find a 4.5 year old on another property scoring 140-160....so who is actually "holding out".
Basically it's all relative, but if you own property, even small parcels, and practice intensive habitat management activities, it is truly possible to raise the bar of expectation anywhere a whitetail lives.
Hey, if a hunter can hold out for something bigger, and he or she is lucky enough to have larger bucks around....more power to them! I just wish I owned their property