This question isn't that difficult, that's why he made it a percentage, not an inch class. Anyone should be able to answer for any geographic region. Regardless of where you are.

Some people may consider only the top 2%best scoring bucks of an area top end, others may call the top end the best 25%.

Personally 'top end'to me is the top scoring 2-3%. I'd say my targeted bucks fall within the top 7-10% of the area's buck population.