I had the reverse experience. I was once the only American on my team, but the Brits were loud and annoying as hell. They also thought hunters were useless and that they were real cool with how you could get the "secret chest" in Gorgons' lair by passing on the Templar chest. I had already completed the raid that week and didn't need loot, so I didn't bother to tell them that you can hit every chest and still get the one in Gorgon's lair. To top it off, one of them rage quit the final stage.