We had ~40 people on last night, and were experiencing intense start-of-round lag on one map. I forgot the name of it, it has a building in the middle, a lower level that you can turn the lights off in, and a trolley thing that can carry you to a tower.
After we got off that map it was alright, but I don't think that map will work out.
My ping is ~160 now, as opposed to 140, so yea. It's okay.