The on time performance of Air Canada and their operation at CPH is rather low. I have heard complaints from friends who have been delayed on that flight, serving YYZ, on several occasions.
AC almost never cancels the flight so they will carry you across the Atlantic but on time performance is very low. Almost in the same league as PK and IR.
I was at CPH last Saturday and I saw myself how flight 883 was halted after push back and passengers had to wait onboard for two hours.
Is this related to somewhat old 767 equipment? Will this improve once the 333 start serving CPH from June this year?