Alby,
4 guys, 3 days. 27 trout.
Each guy averaged 2.25 trout per day. I don't consider that to be ridiculous. While I don't know the Yough very well, my first impression was actually that they did pretty poorly! But still looked like a good time (a bad day fishing....).
Though, to be fair, it doesn't look like all 3 days were in prime trout water, so while in trout water they musta done better than that. Then the carp were on top of that.