Yes and sometimes I was at The Goldstone when the atmosphere was completely flat. What is your point? Everyone knows that in the days of standing terraces it was easier for the singers to congregate, but we are talking about 2016 in a seated stadium.
Cor blimey it's not complicated...the North Stand has got two separate factions who sing different songs both at the same time. Perhaps with a drum there would be better coordination and the rest of the ground would join in more. I can draw you a picture if required...