the only thing that i think has changed in my neck of the woods is population and huntable land.
I'm not sure if deer got smarter, but have adapted to population around the city limits. it's hard to go to the "deep woods" in southern ontario, but when i started all this, a guy at the bowshop told me that if "a smelly Mennonite teenager who's wearing blue jeans and plaid climbs a treestand and shoots a deer on opening day, so can you".
that year i got out with no clue what i was doing and had 3 perfect opportunities in about 6 hunts.
add in a few years, more toys and you've got the same idiot in the woods counting on dumb luck to bag a deer.