I don't think that carry should really change as long as you're playing the right kind of line; however, I've often been struck by how much weaker today's balls are compared to those of years passed.
In their day, both the Inferno and the Lane 1 Cherry Bomb pearl were two big-hooking pieces. Neither handled tons of oil, but they could really cover some boards if you had dry to bounce them off of. Out of nostalgia, I picked up a Cherry Bomb Pearl a year or two back, and that ball slid like a hockey puck! I simply couldn't use it in the same part of the lane I used it in back in its heyday. Now, when I squared up and went with the boards, the ball hit just fine when I got it to the pocket. Still, it wasn't the swing it and bring it ball that I loved so much when it was new.
At least in my area, the new lane surface, different machine, and different conditioner being used all add up to old balls not having nearly as much bite as they did when they were new. You can still strike with them, but not from the same lines you did when they were fresh out of the box. Maybe that's just me and my center/area.