Jacks do pull hard, but they make a couple of runs and the just turn sideways and make you work. A red pulls all the time. Not using his body width to create pressure.
Having said that, not fish fought hard. My boss caught that jack on a medium light rod and got it in in about 20 mins. I used a medium rod and got the red in about 30 mins. The jack was near the boat in 8-10 minutes and went around and under the boat. The red didn't get close to the boat until about 20 minutes and kept getting closer and closer until I had my boss net her....but she wasn't really ready. I just didn't want to lose her.
Either way, it was very fun and I want to do it again!!!