Invasions easier when less pirates present?

[MacIronhawk]

Is it true that when less pirates are on a server during an invasion less enemies are sent out or their HP is lower?

I just fought in an invasion on Cruzos and it was fairly easy. I died twice and protected some barricades all by myself. It was a bit hard, and I was a bit scared Jolly Roger would win. However, about fifteen of us fought him, and kept out distance, throwing grenades at him.

I and another pirate used the big grenades and did quiet a bit of damage to Jolly Roger. In fact, just as a tip, I advice staying about twenty "pirate feet" away from Jolly Roger so you won't get knocked out. About seven pirates were around Jolly Roger as he went back and forth to attack us.

Again, I heard some things about how invasions are harder in quiet districts, but doing this one I found it quiet fun, and lag free! My graphics were turned way up, too! I just loved the experience and got some great shots of Jolly Roger. In fact, one of them is the one I'm sending in for the creepiest screenshot contest.

So, why are people obsessed with going to Abassa or one of the full servers to fight an invasion when they can have a much better experience, from what I've seen, in the quieter servers.