I wouldnt say that. Was on LY011 4/16 we took off 1 hr late , but made up 50 mins once airbourne

However even as a US Citizen it took well over 1/2 hr to get thru IMM , I believe a KE flight got in just before us. And then it took close to an hour for the bags to start to come out from arrival time

dont know if this is the norm as I havent flown LY in close to 25 yrs and hopefully it will be longer then that till I do it again (at least around Yom Tov time, I thought I was being held hostage in a Gan Yeladim and still dont know which babies were the worst the kids or adults)