As was already mentioned and re-emphasized by catbirdseat was the fact that they felt they could do whatever they wanted to do; including, cutting in front of us, telling us what we could and couldn`t climb, where we could eat, etc.
BTW, we were not slow at all, just had some decency and respect for the other climbers by waiting until the other party had at least gotten off the ground!
We were waiting right there ready to climb and they just ignored us and started on the pitch.
I would have enjoyed telling them to F-off but I was outnumbered and the situation didn`t really present itself.