so since i started djing alot more and hanging around alot more guys that have been playing longer than i have i noticed alot of them have songs with intros that make it easier for mixing. here is one example
i was listening to another dj play the other night and he had an intro of just drums and that bass tone. then after i think 8 bars drake came in, as opposed to it just starting off with him in the beginning.
these are probably just self made edits, i know a few who do this with ableton. some tunes come with a standard club edit which usualy also prolongs the intro/outro