Why does my mac take 60-90 seconds to wake up?
As soon as it wakes up next time, examine the file /var/log/system.log (open a terminal and type less /var/log/system.log; Or open the Console app and find Files/system.log).
Scroll to the bottom (the most recent entries) and find the time at which you just woke the machine, scrolling up if necessary. The entries from there to the bottom should give a clue as to what was going on during the wake-up period.


You can also look through previous wake-ups the same way, to look at what was happening during the long delay.