The 60' report was also in use with my last 3 companies.
Works very well indeed in that almost no individual turns up at -60 but rather at -80 or even -90. So, no rushed briefing.
Chief pilots, managers and accountants all love flight crew to work for peanuts
Then it also depends on the time needed from the crew room to the aircraft, e.g. LGW being one the longest around thanks to gate location and questionable security checks
live 2 fly 2 live