Thing with the old firm is that both sets of supporters are spoilt on success. If the game is tight and the fans are nervous it can be pretty quiet in the ground. Neither side can face loosing. As soon as either team takes the lead it goes nuts.
Whereas something like the Edinburgh derby the fans just go at it never mind the game cos they are used to having to actually support the team rather than just 'sing when ur winnin' as it were.
Good point Spencer. Although at the final whistle in this season's derby there was hardly any Hobos left! Probably because they were dicked!
Annoyingly, there is a good chance that I may not get a ticket for Easter Road later this month due to demand, even though I have a season ticket. 11,000 into 3,000 just won't go!