It was noticeable at the Australia v England games, more than we get at games in England or Europe. I'm neutral on the matter generally. I can get the idea that especially in an extended break in play at a Rugby game or between heats in an Athletics Comp or such it can be a way to keep the crowd "involved" in the event, but I can also get fed up with things being overdone (see Sweet Caroline at *every* event, Delilah at Wales games, etc.)