Something else to keep in mind is how fast you chill the wort versus how fast they chill the wort because they will affect the result of your late hop additions. For example, if they whirlpool but you don't then you need to let the wort sit for the same amount of time they whirlpool before you chill (or you could add your late hops earlier in the boil). Otherwise, you will end up with less IBUs and a slightly different beer because you don't have that same isomerization timetable.