Depends if you are bothered about 'official time' or your actual riding time.
Did a sportive with a couple of friends once, who didn't want to stop, because they were 'going for a time'. I wanted to enjoy the potential for a social experience, so I said 'adios' to them at the first feed stop, and let them go off. On a non-sportive long ride (say 80-100 miles) I'd usually stop twice en route, so I tend to do the same on a sportive... so yes, the official time is longer, but my actual riding time (on an app, on my phone) is what I'm interested in.
I'd rather stop and chat than whizz round, personally.