Talking as a Pencoed person born and bred, it is a weird place football wise.
My age, 56+ and it's 100% City, As Sludge says, the Toshack years produced a band of Jacks who are now around 50-54 years old. Ages around 30 to 50 are City fans, but the kids of the Toshack era Jacks are now all Jacks too, so maybe ages 25-30 years old? Then it's City again below that.
Ginger (Nasty) is on the message board from time to time, but don't know if he posts or not. He doesn't admit to it anyway!