I was [at GenCon]. The list diversity was pretty amazing.
This. In the 7 rounds on Thursday I faced off against a single squad sporting a YT-1300 and a single squad with a TIE phantom. That's 5 squads I faced that didn't include those ships. I'd call that a pretty diverse field.
On the other hand, there is something to be said for win-loss record. I ended with 4-3, but I only won every other match. It is quite possible that lists with those ships were so good that they were all high above me in the field and I only saw them once because I was playing in the lower half of the group. Possibly.
All I know is that I had a blast playing against such a diversity of squads with my TIE interceptors.